(Edits by Twice!)

Sonic the Hedgehog, the Freedom Fighter and Hero of Mobius from Fleetway Publications’ Sonic the Comic!

Kasen Ibaraki, the Wild and Horned self proclaimed “Hermit” Sage of the Touhou Project!

While these two monoliths of East and West may seem to be as far removed from one another as conceivably possible, these nature loving heroes have more in common than one would ever think. Within these two lie demons of incredible malice that they fight to stop on the regular, these struggles going on to define how they live their lives, pervade their entire stories, and hang over them like their own deaths! But despite it all, they face these parts of themselves head on and with full confidence, and try their damndest to help bring about a better tomorrow.

A lot has changed since the last go around in 2022, so why not stick around and give this behemoth of a blog a go over? It’s twice as long and even more comprehensive, and should deliver the true, final decision on who would win… in a DEATH BATTLE!

Preliminary Info:

(Because things just cant ever be simple, can they, eh?)

It's finally happening yet again! After over a full year and a change, it’s time for the revisit you’ve all been waiting for, Fleetway Sonic vs Kasen Ibaraki! As you’ll all remember, I’ve done this blog before, however, last time was a bit more limited in the scope of what was researched! I hadn’t covered as much ground in Touhou as I have now, and I only used the original STC Continuity for the blog, as I had a bit of a short timeframe to make the blog, and I wanted to cover the main canon of both characters specifically. However, while researching Sonic, I found out that Fleetway has a lot of arguable secondary media, and upon asking you all if you’d be interested in me covering it, it was pretty overwhelmingly a yes!

After Kasen vs Sonic made it to the Death Battle Season 10 Tournament of Champions, interest in the match only grew further, which was my ultimate motivator for getting back to progress on this blog! I’ll be using a lot more media for Fleetway Sonic this time, so I’ll give a quick rundown on what’s being used as secondary canon for the Hedgehog, as he’s where most of the new content has come from!

What’s new to be covered? Well:

Sonic 1 and 2 on Genesis are going to be considered for research, as both are considered canon to Fleetway. Stay Sonic also makes mention of Sonic 2 Master System, so it may be viable too.
Any new findings from the original 184 Issues of Sonic the Comic, and its specials.

While there’s 223 issues of STC, issues 185-223 were just reprints of all prior issues, 184 was the final issue to have a new storyline.

Any interviews or statements from the main writer of STC Nigel Kitching from various websites and the old STC Yahoo Group
Stay Sonic, The Penguin Books book under the Fantail imprint, which serves as the basis for what Fleetway Sonic would be built from.
The four Virgin Book Novels, which would use Stay Sonic as a basis and are very adjacent with early Fleetway’s story and lore. Those being:

Sonic the Hedgehog in Robotnik's Laboratory
Sonic the Hedgehog in the Fourth Dimension
Sonic the Hedgehog and the Silicon Warriors
Sonic the Hedgehog in Castle Robotnik

All of Sonic the Comic Online, the fan continuation of STC that’s currently released, which includes:

Issues 224 to 279
The Exit: Sonic special
Sonic the Comic Online Poster Mag 2004, 2005, 2006, and 2007
All the specials including the Halloween, Christmas, and the 15th Anniversary specials
Special Sonic the Comic Con Issue 2

Why is this blog including Sonic the Comic Online despite it being a fan product? Well, for one, it’s been officially endorsed as a continuation of STC by the original writers and artists and is generally appreciated by them, to the point they worked on a special to conclude the plot of STCO on their own terms (Exit: Sonic), and SEGA themselves even printed an issue of it in the Summer Sonic event.

Now, on Kasen’s front, there isn’t really anything particularly different I’ll be using here, it’ll just be more findings in regards to Touhou’s feats, scaling, and cosmology as I’ve had more time to pinpoint the verse and where it lands! I’ve had a lot of calculations done for Touhou (and STC!), so a lot of new info should be covered!

Also to note, later on in the blog when discussing specific abilities or feats, if I’m covering something that’s exclusively from STCO, the Games, or the Novels, I’ll be sure to note it in brackets like this: [STCO] / [Novels] / [Game] so it’ll be clear that the feat I’m talking about isn’t from original canon.

Also if you notice any descriptions that are near identical to how they are in VSBW, it's because I probably wrote that description and/or helped Fuji put it there in the first place, and I have NO problem stealing my own work!!! (:

I also have no problem with Kirb stealing my work.

-Mad Dog of Fujiwara (real)

I also will be experimenting a bit in terms of how I classify stats in this blog, so if you see any strange terminology, just reference this document.

ALSO for fun, if you’d like to research these two yourself, I included media guides for both, one for Sonic which basically just covers everything, and one for Kasen which gives you the most immediately necessary and relevant info.

Backgrounds:

Sonic the Hedgehog (El Fleetway Edition):

(Edit by Twice!)
(This story description will largely cover new information from STCO! If you want to see a breakdown of Fleetway Sonic’s background covering the entire original comic, check my breakdown in the original blog)

“What a life! Never a dull moment... And that's the way I like it!”

After defeating Chaos, re-merging with Super Sonic, and finally avenging Johnny Lightfoot’s death, Sonic continued what he’s always done, being a hero. But what Sonic would find after finally dethroning Robotnik was a world he wasn’t fully prepared for. Sonic would find himself faced with all manner of new threats, ghosts from the past in the appearance of Shadow working together with Doctor Zachary to cause the destruction of the Special Zone, and attempt to destroy Earth, the streets becoming overrun with gang wars, participating in two sisters’ Universe Game for the fate of his reality, and a wild court case with the Order of Magick featuring Blaze the Cat and a world ending time loop.

But the biggest and most shocking difficulty Sonic would ever run into… would be the media itself. Robotnik’s loyal ex-henchman, Grimer, began leaking secretive information gained from spying into the Kintobor Computer’s systems to the Kane Broadcasting Station, with KBS beginning to air constant smear campaigns, documentaries which painted Sonic out to be just as big a villain as Robotnik, and reporting on situations to make Sonic look in as bad a light as possible, until he was finally framed for an attack on Emerald Hill Zone, and a Metallix doppelganger attacked Sonic’s friends while disguised as him, making him out to be a true villain.

Despite being innocent, and despite being the Hero and Savior of Mobius, Sonic would find himself being hated by nearly all, and trusted by few. His heroics were no longer appreciated, and his friends no longer trusted him, leaving Sonic fighting for a cause that didn’t support him. For a brief while, Sonic’s resolve even wavered, with him considering leaving his home altogether, leaving for another dimension, where he could escape the hell his life had become, almost giving in to the mounting pressure. But upon learning of the return of Robotnik, funded by the Drakkon Empire (something he was technically responsible for), he strengthened his resolve, realizing he still had a purpose, a cause to fight for, whether people wanted him to do so or not, and stuck with Mobius, beginning to fight against Robotnik and his forces again, but on his own, doing what he thinks is right.

The only person that stood by his side was his little buddy Tails, who still believed in him, but Sonic, realizing that Mobius had lost it's hero in Sonic, begins to egg Tails on to become the true hero that Mobius needs in its time of need, being the final push Tails needed to become a true hero, and the temporary leader of the Freedom Fighters in his absence, leading the fight for freedom against the mad dictator, becoming the symbol of hope that Mobius needed… while Sonic would do what he could in the shadows.

In the meantime, Sonic would still struggle and do what he could, while constantly on the run from the authorities, the media, and even civilians angry at what they believed he had done, leaving him constantly exhausted and on the brink. This would result in catastrophe when he’d be captured, and his captors would try to forcefully turn him into Super Sonic and control him, trying to make him a dog that would follow whatever orders they wished… until Super Sonic broke out, and began his plan to cause mayhem yet again. In an alternate future, right here and now, Sonic would become the “Iblis”, going on to destroy the world and kill everyone on it, but with the inter-time intervention of Silver the Hedgehog, and all of Sonic’s friends working together, Super Sonic would be cast out of Sonic once again, freeing him from the demon for a time.

Now freed of Super Sonic, Sonic would be able to meet the rest of the Freedom Fighters in a major battle against Robotnik, helping to turn the tides in the war and defeat the Doctor, and then help stop the Drakkon’s attempted takeover of Earth, finally able to harness Chaos Energy in a positive way for the first time, becoming Hyper Sonic, as just him, just Sonic, and then destroying the Drakkon fleets and restoring peace to Mobius, and then proving his innocence to the public, and having his status as a hero restored, his tireless work and fighting for peace finally paying off.

Years into the future, well after many, many more adventures we’ve yet to see, Sonic has finally begun to get old, alongside all his friends, Amy even getting married to Tekno! In their older age, they finally want to find a way to possibly bring an end to their conflicts for good. In order to help Porker better understand Chaos Energy, to finally control it in a positive way, he began to undergo excruciating forms of Chaos Dialysis to help further the research, making him extremely ill in the process.

At this crucial time, he would come face to face with a sudden appearance from Robotnik… and Super Sonic. In their final encounter, Porker would use the knowledge he gained from studying Chaos Energy to align Sonic and Super Sonic’s quantum frequencies, finally merging them together, restoring Sonic to full health, and resulting in Super Sonic finally disappearing, his malevolent, evil personality gone from Sonic, returning him to normal… alongside Kintobor! With peace on Mobius finally restored, Sonic is able to live out the rest of his days happily, with his oldest friend Kintobar finally back, and the world he fought so long to protect finally safe. His fight for Freedom finally, truly, has come to an end.

Kasen Ibaraki:

(Edit by Twice!)

“My ideals exist alongside the laws of heaven!”

Hundreds of years in the past, there lived an incredibly fearsome and powerful oni, known as Ibaraki-Douji. One of the Big Four of the Mountain, alongside Suika Ibuki, Yuugi Hoshiguma, and another unknown member, she was one of the most powerful and respected Youkai of all, operating their base within Mt. Ooe. At some point, they would break into a rampage onto Kyoto, causing mass havoc. However, at some point during this rampage, Ibaraki-Douji would be fought off by a powerful warrior weiling the Onikirimaru, a powerful youkai blade capable of sealing away even the most resilient youkai. Using this blade, the warrior would sever her right arm, sealing all her malice and hatred within the arm, before taking the arm as a trophy and sealing it away within a protective box.

The Oni once known as Ibaraki-Douji, after losing all her malice, would find herself rapidly losing interest in the hellish reality she remains within, and would decide to pursue another world, a better world. She would disguise her Oni heritage and her previous life as a Deva, adopting the lifestyle and appearance of a Hermit, in order to pursue the path to Heaven, and in doing so, would take upon her new name, Kasen Ibaraki. With all of her malice removed, she would end up becoming an incredibly compassionate, and emotionally vulnerable person, who’d try to help others wherever given the opportunity while following her path as a Hermit. During the path she followed in her new self-created life, she would find herself becoming acquaintances with Yukari Yakumo and Okina Matara, a powerful Gap Youkai and God respectively, forming the group known as the Sages of Gensokyo. Together alongside them and the great Dragon God, would create the realm known as Gensokyo, a land of fantasy, and paradise for all who come to find it, whether they be Youkai, Gods, humans, animals, forgotten beings or those who were never accepted elsewhere. The land became sealed off from the outside world in 1885 A.D.

Kasen would continue her hermit lifestyle within Gensokyo, hiding her life as an Oni and even her position as a Sage of Gensokyo from all within, eventually becoming known as a “mountain hermit” at some point in 1980. All the while, she would occasionally leave Gensokyo for the Outside World in search of her severed arm, as Kasen was well aware of the power and malice withheld within the arm, and she knew that one day, the seal would weaken enough for her other half to escape, and wreak havoc upon the world. Eventually, after centuries, she would finally find the box her arm was sealed with, up for display at a run down old temple, its seal already immensely weakened. Realizing the gravity of this situation, and after failing to reseal the arm herself, Kasen realized she would need to enlist the help of a sealing specialist.

This would lead her to the shrine of Reimu Hakurei, Gensokyo’s primary incident resolver, youkai exterminator, shrine maiden, and most importantly, sealing specialist. Knowing that just dropping such a task on Reimu would only cause trouble and expose her true nature as an Oni to all of Gensokyo, she would instead aim to befriend Reimu, and slowly overtime, train her in whatever ways possible, so she would be ready to confront Ibaraki-Douji’s arm and reseal it when the day would come.

After several years, many more incidents, almost accidentally causing the destruction of Gensokyo, and a lot of Kasen trying her damndest to guide Reimu down the right path to be fully prepared, the day would finally come. Reimu would discover Ibaraki-Douji’s Arm, and after fighting with it for a short time, would have her soul separated from her body and sent to Avici to be trapped for eternity. However, anticipating this, the real Kasen would also send Reimu’s body with her soul to Avici, to allow her to escape what would have otherwise been an inescapable prison, and to confront Ibaraki-Doujin’s Arm. After a brief fight with the arm, Kasen herself makes her way into Avici, fusing with her missing right arm, becoming a full Oni yet again.

After doing this, she tosses a piece of food to Reimu, so she wont fight on an empty stomach and can put up a true fight. What Ibaraki-Douji doesn’t know is that hidden within the food, was a fragment of the Onikirimaru blade, the only thing that could seal her. With her body in turmoil with itself, and with Reimu having everything she needed to finally remove Ibaraki-Douji from Kasen’s body, she battles with the Oni yet again, finally sealing the arm away again for good.

After recovering from the ordeal, obtaining her sealed arm, and bringing it home with her, to keep it as a constant reminder of her past, of who she used to be, and who she must never, ever return to being. After Kasen takes some time off to herself and reflects about things, she eventually comes to the decision that she’ll continue living the life she created for herself in Gensokyo, following her chosen path as a hermit to eventually reach heaven, and to continue acting as a mentor to Reimu, keeping her and her shrine on the right path, because in her own words, “and if I don’t do it, who else will?!”

Intelligence, Experience & Skill:

Sonic:

Intelligence wise, Sonic isn’t a slouch, even if it's not his area of expertise. Sonic has about half the IQ of Kintobar, and considering that Kintobar had an IQ of 268 at the Age of 4, Sonic would at minimum have an IQ of 134 [Novels]. He’s rather perceptive, able to figure out that Brutus was programmed to think and act like Robotnik after a single brief encounter with him, and was able to pick up on bits of information and understand theories of physics by watching Kintobar [Novels].

He’s skilled enough to drive a tank and even (somehow) pull off a bootlegger's reverse in it, he was smart enough to know how to manually rapidly operate the Death Egg’s controls to make it crash into the ocean rather than Green Hill Zone.

Perhaps the most surprising thing about Sonic, is he’s actually a rather good strategist, having a shockingly tactical mind! He was the leader of the Freedom Fighters and their fight against Robotnik’s dictatorship for most of the comic’s run, and is often is the one who would come up with many of the Freedom Fighters’ plans, such as planning ambushes and baiting his opponents, or using the specific abilities of his teammates to work together to overcome a foe they couldn’t on their own. He was able to remember the exact layouts of the tunnels of Miracle Planet several months after he was there and use them to give himself an advantage when raiding the enemy. He was even able to recognize when things seemed weird, and was able to intuit that Robotnik was trying to track him, and instead of heading back to base, waited at a remote location for his forces to arrive.

Within combat, Sonic’s a master of on the fly thinking. He’s regularly able to battle with large groups of enemies, is able to utilize his enemies firepower, as well as their own stupidity against them, is able to quickly utilize the weaknesses of his opponents to dispatch them as quickly as possible even when in disadvantageous situations, or using robotic remains alongside the environment to his advantage. He’s also remarkably skilled, able to pick up and use weapons near masterfully even with no prior experience.

Super Sonic is significantly less so. While he was initially a complete berserker, acting with intent to destroy and destroy only, after absorbing the energy of the Complete Chaos Emeralds to become stronger, and after spending a long time within Sonic, learning and failing to wreak havoc on his own, he began to become more patient, eventually becoming able to formulate plans, learn from his mistakes and take advantage of those who may try to control him, and exploit those around him to grow even more powerful, and learn new techniques [STCO]. Super Sonic does still markedly struggle with much in terms of tactics though, especially with his overbearing cockiness and sadism, and as such, his own personality results in him not really relying on this side of himself much.

Kasen Ibaraki:

Kasen’s also incredibly smart. She’s stated that she’s able to remember every single event of her life, from the moment of her birth, which would encompass over a thousand years of knowledge, giving her some insane memory. She’s spent her time as a hermit undergoing constant training and meditation, as skipping out on her training could cause her body to crumble away; This would give her hundreds of years of training under her belt. Her centuries of living have given her a treasure trove’s worth of worldly knowledge, ranging from vengeful spirits and the metals they produce, tube foxes, various magical items, obscure medicinal herbs, or the nature of youkai. Like any oni worth her salt, she also knows a great deal about sake. She was able to understand Sumireko Usami’s incredibly confusing dream self astral projection predicament, as well as the logically paradoxical nature of the Occult Balls, to the point of being the very first person to understand them and the danger they posed in full.

Kasen’s also regularly showcased as one of the more intelligent individuals within Gensokyo. She was able to intuit the Moriya Shrine’s plans behind an artificial dam just by noticing small discrepancies in their story, doing her own research on the subject to further supplement her knowledge. Similarly, her research has also led to her finding out the true origin of Tori-no-Ichi, letting her (mostly) prevent a wildfire before it spread out of control. She was able to outsmart Mamizou Futatsuiwa, the leader of the Tanuki, a band of certified scheming tricksters, in their own game, making her lose a drinking contest by exploiting their hubris and their own weaknesses. She’s shown similar craftiness with close friends as well, goading Reimu into losing under the guise of hyping her up specifically so she could win a bet. She’s most notably outsmarted herself, hiding the fragment of the blade Onikirimaru away so that it could later be used as a trump card against herself, all without her alter ego finding out, showing excellent skills in planning ahead of time.

It also goes without saying that being able to hide her identity as an oni for so many centuries requires a great deal of intelligence in order to keep up such a deception for so long (especially when her last name is literally Ibaraki, which isn’t very subtle).

In terms of combat skill, Kasen is leagues above fodder fairies, who train by dodging natural snowy weather. She’d also compare to other youkai, who can roll dice so precisely that they can perfectly duplicate a previous roll’s angle, force, rotation, and result.

Arsenal & Familiars:

Sonic:

Power Sneakers:

Sonic’s iconic red and white striped sneakers, which are specially created to reduce friction while running, to prevent his shoes from wearing out and to allow him to run at top speeds with little resistance. Initially gifted to him by Dr. Ivo Kintobor, they were what allowed him to reach the speed of sound the first time.

After the events of Fourth Dimension, the Time Cops would upgrade Sonic’s sneakers to include automatic odor removers and a self cleaning system, which is cool I guess [Novels].

Hair Comb:

The most important piece of equipment of them all, Sonic carries a hair comb on him in the event his totally radical spikes should get ruffled in any way (Sonic branding notwithstanding). [Novels]

Game Gear:

As a certified SEGA Gamer, Sonic has his own Game Gear that he loves to play in his spare time. Probably seething at Sonic 2 Game Gear with that ridiculous fucking screen crunch.

Mobius Rings:

The rings of Mobius have a variety of effects. Their collection can allow the user to be protected from Chaos Energy, and also gives them increased durability / protection to oncoming enemy attacks, and Sonic even theorizes that enough of them could drain the Chaos Energy from an individual, and they’re also capable of “flowing good karma” in order to stabilize large quantities of evil [Novels]. They’re even able to, somehow, absorb the brainwaves of an individual, allowing for the storage of a perfect copy of their consciousness. Most notably however, is that they can be used to transport dimensions with a surplus of ring energy, such as when Sonic used them to travel into the Special Zone.

Sonic and Tails collectively stockpiled about 884 of them during the events of the novel Silicon Warriors [Novels] and have likely only collected more.

Underwater Suit:

When purely underwater combat is required, Sonic’s prepared with an underwater exosuit, which allows him to obviously stay underwater for extensive periods of time due to its oxygenation. It was also devised to give him complete underwater mobility, allowing him to travel underwater at high speeds and use all of his special attacks underwater, including the spin attack or blast attack. It’s also notably durable, being able to handle fighting other creatures underwater, smashing through walls/windows, and handle the impact of Sonic’s own speedy attacks.

The Tornado:

Sonic’s signature airplane, though it's mostly piloted by Tails while Sonic stands on the wings. While Sonic has never flown it himself, considering his other vehicle experience, he could likely use it himself. It's capable of traveling across Mobius at high speeds, for when chasing an aerial threat, or when Sonic needs to get somewhere fast, but not too fast as to leave his little buddy behind. It's been destroyed and rebuilt many times, but is a handy little plane, can’t go wrong with a classic.

Aircraft:

Should Sonic ever need to get to a location, aerial or otherwise, with a large group of friends, he has a special aircraft capable of carrying 4 people he can pilot with ease.

Sonic also seems to have a variant of this craft capable of traveling underwater, and to incredibly deep depths near the ocean’s surface as well.

Bob Beaky Disguise:

When he needs to go undercover or mask his identity, he has a consistent cover he uses called “Bob Beaky”, a penguin that’s completely covered in winter gear, masking his form completely. He’s used it to fool his enemies on several occasions, and frequently used it to go incognito for long stretches of time.

However, during the later events of STCO he retired the disguise after his cover was publicly blown by the media. [STCO]

Item Monitors / PCs:

Item Monitors are described in depth within Stay Sonic (though they’re named PCs), as Kintobar created devices that atomically reconstructed themselves or absorbed rings in order to become useful to Sonic in his fight against Robotnik. Considering that Sonic 1 and 2 Genesis, as well as Sonic 2 Master System can all be reasoned to be canon to Fleeway Sonic, he should reasonably get access to all Item Monitors available in those games. This gives Sonic access to:

Ring Monitors: Gives Sonic an extra 10 Rings.

Power Sneakers (Statistics Amplification): Increases Sonic’s speed significantly for a brief time.

Shield (Barrier Creation): A one time use barrier which will protect Sonic from any hit.

Invincibility: A temporary invincibility powerup, making Sonic invulnerable to just about any form of harm for a limited amount of time.

Kintobor Computer:

A computer system kept at Sonic’s bases, containing an exact replication of Kintobor’s brain waves before being transformed into Dr. Robotnik by the Chaos Emeralds, created when his brain waves were somehow burned into a Golden Ring that was on the scene of the accident. Through the technical know-how of Porker Lewis, he devised a computer system that could have Kintobor’s personality built into it. While typically stored in a master computer at Sonic’s Secret Freedom Fighting Base, the intelligence can be transferred to a Laptop or a Golden Ring should he need to be brought on the go.

He’s an incredible, state of the art system, able to hack into and control nearly any device in his vicinity. He’s able to keep tabs on Robotnik’s transmissions, keep track of the location of all of Robotnik’s forces, monitor specific zones to ensure he could detect when a zone is attacked to alert Sonic and friends, track and pinpoint large accumulations of Chaos Energy, and at his best, was eventually upgraded to the point that he could monitor the entire planet through spying on satellites and various sensor readings throughout the globe. He’s also displayed the ability to manipulate machinery in order to manipulate Chaos Energy, such as when he used a Star Post to pull all of Super Sonic’s Chaos Energy out of Sonic, and sent it to the Special Zone. After being hacked into by Grimer, Robotnik’s second hand, Porker would install a protective sub-routine to ensure that Kintobor’s main system would be hack-proof.

The Computer also has incredible analytical and predictive abilities. When installed on a weapon, the computer had analyzed Sonic and knew him so well that he was able to perfectly predict any action he could or planned to take,

Through unexplained means, he was once able to open up a portal through time that allowed Sonic and Johnny to travel several years into the future, and then another one that allowed them to go back in time as well [STCO].

Kintobor Wristwatch:

A wristwatch used by Sonic to communicate with the Kintobor computer. This allows for him to be relayed any and all necessary information at any point, allowing him to consult the Kintobor Computer for essentially any of its available resources.

The Wristwatch’s range is somewhat inconsistent throughout the series, however. At its worst, Kintobor’s communications systems lost connection to Amy on Miracle Planet when she was teleported through space-time to another part of the universe, but at its best, the Wristwatch could keep in touch with Tails in the Nameless Zone, an entirely separate dimension [STCO].

The Complete Chaos Emeralds & Master Emerald:

The Chaos Emeralds are sources of immense power and energy, containing an infinite supply of energy. They also have the notable ability to absorb the evil of those they’re near, turning those next to them into mellow, happier individuals (at least for a while). In fact, this evil absorption is what led to the direct creation of Super Sonic within Sonic, as he was blasted with a dose of evil infested Chaos Energy, creating Super Sonic within him.

Sonic initially protected the 6 Emeralds in their Incomplete States, having all of them safely secured in a box that would regulate their temperatures in a secure location so as to not make them turn volatile.The Incomplete Emeralds, while drained of most of their power, still held enough power within the release of a potent dose of negative Chaos Energy that created Super Sonic.

They would later be fused together with the other 6 emeralds (yes, there are 12 Chaos Emeralds), and then fully powered up, in order to form The Complete Chaos Emeralds. The Complete Chaos Emeralds are significantly more powerful, allowing whoever absorbs or draws power from them to achieve incredible reality warping powers, being the power source for Super Sonic, God Robotnik, and Perfect Chaos. Sonic no longer keeps the emeralds on hand once they became The Complete Emeralds, as he would forfeit them to Knuckles so they could be safely watched at and empower the Floating Island, though he regularly visits and even lives on the Island for a time. While they are not a part of his standard equipment, his Super Form has all the powers netted by them due to… being powered up by them…

Kasen Ibaraki:

Artificial Arm:

Kasen’s signature bandaged arm isn’t actually an arm covered in bandages, no, it’s an artificial arm composed of a vaporous black smoke and bandages. However, it can compress itself to look just like a bandaged arm, and despite being made of smoke and bandages, has the full functionality of a regular arm, able to grab, hold, and punch things just as any arm could. Its strange composition also gives it a myriad of different functions and abilities. It can disconnect from her body and be remotely controlled on it's own to grab things at long distances, it can stretch further than normal to extend her reach, it can grow in size, ensnare opponents, create cocoons to withhold opponents, twist and spin in contortions to spin opponents like a tornado, release energy blasts, and much more.

Its most important ability however, is its ability to grab and crush spirits, souls, ghosts, phantoms, any non-corporeal spiritual entity can be crushed by her prosthetic arm. Any spirit crushed by her arm is completely obliterated, to the point of being removed from the cycle of reincarnation, with even Shinigami being puzzled by its ability to do so.

Non-Physical Interaction - Kasen can grab, hold, and affect vengeful spirits with this arm.
Soul Destruction - Kasen can crush spirits in this arm, destroying them completely.
Immortality Negation (Type 4) - When crushing spirits with this arm, it removes the spirit from the reincarnation cycle, “releasing them from the wheel of life”, essentially obliterating it completely and utterly, never allowing it to reincarnate or regenerate.
Cloth Manipulation - This arm can be utilized as a weapon, extending her reach, changing its shape and form, used as a whip, used to ensnare others, trap and spin around opponents, detached and remotely controlled, make a massive bandage tornado, and much more.
Intangibility - This arm is made of bandages and a vaporous black smoke, and it can de-materialize itself into this smoke at any point.
Regeneration - The arm can easily regenerate from being blown apart by simply reforming from its black mist.
Energy Projection - This arm can release blasts of energy and clusters of projectiles.
Possible Explosion Manipulation - Caused a young lightning lizard to explode upon piercing it with her Artificial Arm. This could just be another form of her soul destruction, however.

Ibaraki Box of Medicine:

A special one shou box (approximately 2 liters) that has the special ability to cure all illnesses or heal any injury of the one who drinks from it. Should the drinker already be healthy, they’ll be granted extraordinary superhuman strength. It does have some drawbacks however, in that whoever uses it will temporarily become like an Oni in personality shortly after drinking from it, and should anyone repeatedly use it, they will become an Oni overtime as well. Considering Kasen is already an Oni, neither of those things are of concern to her, though, so she mainly uses it to drink Sake from.

Danmaku:

Do you like pretty colors? I sure hope you do.

Nearly every character in the Touhou franchise is capable of creating danmaku. Danmaku battles are the main method of combat within the Touhou franchise, and Kasen has participated in many herself. Danmaku within Touhou is typically intended to be overwhelming, flashy, beautiful displays of elegance for competitive purposes to solve disputes, but to still be completely dodgeable despite that. However, those rules of combat can be broken, and unfair, impossible to dodge danmaku patterns can be created just as easily, in fact, an entire Touhou game was based around this concept. The distinction between fair and unfair danmaku is entirely up to the user, and in a serious fight to the death, Kasen has no requirements to be fair.

Spell Cards:

Spell Cards are the most integral form of attack within the verse of Touhou. Originally designed as a non-lethal form of combat meant to allow youkai and humans to combat each other on even terms, it has since become the most widespread form of combat present throughout the series. Virtually all fights are handled via spell card duels, which are restricted by a number of rules. First, one must give a ‘name’ to their spell cards, which defines the meaning, and thus the power, of an attack. Second, one must make their attacks stylized or ‘beautiful’, usually in the form of complex danmaku patterns. In the words of Marisa Kirisame, if one were to solely opt for the strongest, most powerful danmaku, there would only be a single ‘best’ variation, leading to repetitive and boring fights, and thus, a boring and repetitive lifestyle. These patterns are usually used to represent concepts tied to the user (ie; Marisa’s penchant for star-based magic being commonly represented in her spell cards), their personality, or even their history. Third, the spell cards must be fair in nature; While Touhou’s danmaku is infamously difficult, in-universe it is designed to be dodgeable by even novice fighters, serving the aforementioned purpose of equalizing fights with a large discrepancy in power. Finally, a spell card duel concludes when one person has successfully dodged all the spell cards of their opponent, or has ‘timed out’ their opponent.

While spell cards are generally designed to be used for non-lethal combat, the rules are ultimately still just rules, and can be broken. It is stated that accidents do occur under spell card rules, implying that injury and death are still possible, and Marisa has compiled a small sampling of spell cards capable of outright killing their targets. Furthermore, Junko’s spell cards are ALL designed with the specific intent of killing people. Thus, spell cards are still capable of being used as fully lethal attacks; The distinction between lethal and non-lethal is ultimately the choice of the user. Finally, a spell card user is still capable of using unfair danmaku patterns, with many gladly using impossible to dodge patterns against those they deem threatening enough (such as Seija, who had an entire game based around Spell Card Rules not being followed, with Impossible Spell Card).

While spell cards were initially intended to be literal cards that one carried on their person, this idea has since been retconned, and spell cards are now solely stylized representations of one’s abilities that do not require any sort of extra equipment (save for instances such as Marisa’s Mini-Hakkero).

Koutei:

Kasen’s pet dragon Koutei is one of her most notable pets, as it can easily pick up or carry around her and other humans with ease, and is powerful enough to generate storms, causing severe downpours and lightning.

Weather Manipulation: Koutei is frequently able to generate storms just from his appearance, with these storms able to create torrential downpours and large amounts of lightning.
Flight: Bro is a dragon. Blud can fly.

Kume:

Kasen’s pet Dapeng, a giant eagle cryptid. The bird is powerful enough to easily carry Kasen’s weight on her back and fly her long distances. It can also assist her in battle, attacking opponents and letting her hang off of its legs.

Kanda:

Kasen’s other pet eagle, and her planned successor for Kume due to his old age. While Kanda is still young and inexperienced, having difficulty with tasks such as shopping and navigation, he can still assist her in battle like the rest of her pets, and will one day grow to be as large and fearsome as Kume… probably.

Mukou:

Kasen’s pet Raijuu, is another cryptid of surprisingly immense strength, being one of Kasen’s deadlier pets despite its cute appearance.

Electricity Manipulation: Raijuu are electricity generating beasts, able to output enough electricity to cause electrical shocks, call down lightning, create ball lightning, and even form entire thunderstorms.
Poison Manipulation: A Raijuu’s electricity also contains a specially potent poison, one that’s so ancient that most humans, even those with inherent resistance to poison, no longer know how to deal with it. This poison will slowly affect the afflicted, causing them to feel unmotivated, before eventually reaching the point that “you lose the ability to think and become an invalid”, likely, the complete shutdown of your brain, or at least entering a vegetative state. The only cure for the poison, funnily enough, is corn, consuming it allows for a quick recovery.

Houso:

The Alpha of Awe. The Brute of Brawn. The Cultivator of Class. The Duke of Domination. The Emperor of Eloquence. The Fiercest of Fighters. The Greatest of Glory. The Height of Heroism. The Imperator of Intellectualism. The Jarl of Justice. The King of Knights. The Lord of Loquaciousness. The Master of Mortality. The Naysayer of Noobs. The Overlord of Obituaries. The Prince of Passion. The Que-hagen of Quixote. The Ruler of Ruination. The Sultan of Smite. The Taskmaster of Trembles. The Undertaker of Ubiquity. The Vaeyen of Vociferousness. The Warranter of Weaklings. The Xenophobe of Xenogeny. The Yardmaster of Yesteryear. The Zhar of Zoroastrianism. THE INDOMITUS REX THE ALPHA OF ALPHAS THE KING OF KINGS THE LORD OF LORDS THE JUSTICIAR OF JUSTICE HOUSO THE TIGER APEXPREDATORso the MASCULINE GRIPso the CRUSHING INSURMOUNTABLEso the UNSURPASSABLE INDOMITABLEso the UNYIELDING AESTHETICso the BEAUTIFUL SWOLEso the RIPPED TANKso the RESOLUTE PHYSICALLYIMPOSINGso the INTIMIDATING GLAREso the DOMINEERING JUGGERNAUGHTso the UNSTOPPABLE DISCIPLINEDso the ENLIGHTENED ZENso the SPIRITUAL POTENTso the VIRILE ALMIGHTYso the INVINCIBLE VALORso the DAUNTLESS IMPERIOUSso the DOMINATOR INVICTUSso the ETERNAL MAELSTROMso the TITANIC QUAKEso the SPACE-TIME SHAKING COLOSSUSso the LEVIATHAN BEHEMOTHso the MASTODONIC MONSTERso the TERRIFYING LORDso the KING DEITYso the CHRIST CRIMSONso the LEGEND SUPERNOVAso the TRANSIENT soCHAD THE SO SOCHAD THE SO SOCHAD THE CHAD KINGCHAD THE LORDTIGER THE CHAD OF CHADS ENCHAD CHADSO CHADCHAD CHADCHAD CHA CHAD ENTER CHADSO

Kasen’s pet bigass fucking tiger. It guards her home within her Senkai, warding off intruders, though not attacking them unless provoked. Kasen can also easily summon it into battle. Houso is notably powerful, in fact, he was able to injure Marisa Kirisame, giving her a severe slash wound on an arm that she had to have treated, likely making it one of Kasen’s most powerful pets. Either that or it's a hilarious outlier but idc.

He also has enough frame advantage for Kasen to both declare and use a spell card in the same combo. Kneel for Houso-Sama, now.

Manzairaku:

A seal that somehow made its way into Gensokyo after being forgotten by the populace of the city in the real world. While he lives with the Kappa in Genbu Ravine, Kasen has the ability to summon him in battle in the floater fighters to get off a quick attack, before returning to his watery home. Even the artist of her manga doesn’t know how the fuck Kasen summons him.

(Kasen has a number of other pets living in her home, but any others aren’t worth talking about as they generally aren’t combat applicable and thus, are not worth mentioning, except for this puppy, he’s so cute he’s absolutely worth mentioning)

Ibaraki-Douji’s Arm:

Specifically sealed away within a box meant to contain it, is Kasen’s right arm. Within her right arm, contains her true form and power as an Oni, allowing her to unleash her full potential, but also contains an alternate personality, the festering manifestation of all her malice and hatred from her life as a warmongering Oni. Should she be re-formed with this arm, she shall become a full Oni once again, but also become an incredible threat.

The mummified arm itself is also markedly durable, to the point that after being sealed, Reimu tried for an extended period of time to destroy it, even stabbing it with the Onikirimaru, but to no avail. Even Kasen herself admitted the arm could not be destroyed, meaning it’s likely near indestructible.

Fragment of Onikirimaru:

It’s unknown how or where she got it from, but Kasen has within her possession a fragment of the Onikirimaru blade, the only thing that can sever and seal away her arm. She snuck a piece of the blade in food she provided to Reimu before fusing with her arm to allow Reimu the chance to seal her arm away yet again. While we don’t see her with it afterwards, it’s likely she kept this fragment in case her arm should ever need to be re-sealed. You don’t need to necessarily use the blade itself to slice the arm off either, as you could just use it to empower your own attacks to have sealing properties, like Reimu did with her Fantasy Seal.

Forms:

Before we can begin discussing abilities, haxx and feats, first we need to address and acknowledge the specific forms of the combatants, as some abilities are restricted to (or only shown by) a specific form.

Sonic:

Super Sonic:

The infamous and iconic form granted… well, moreso cursed upon Sonic by the Chaos Emeralds! Super Sonic isn’t a standard power up like it is in the Games or Archie in Fleetway, instead being a completely different personality… that comes with being a massive boost in power! Super Sonic is an absurdly powerful entity composed of Pure Chaos Energy, but also a complete psychopathic maniac due to being created by the evil contained within the Emeralds! Super Sonic is functionally hatred incarnate; who wants nothing more than to cause destruction and make others suffer, and have a grand ole time while doing so. Sonic actually spends the majority of Fleetway’s runtime trying to prevent him from taking over his body and gaining control, as every opportunity he gets to do so is another chance for him to wreak havoc upon the world, possibly realizing prophecy and acting as Iblis, destroyer of Mobius.

Super Sonic can be accessed in a multitude of ways, and isn’t limited to just the presence of the Chaos Emeralds or large quantities of Chaos Energy. Sonic can enter his Super Form if he collects too many rings, their energy transforming him, or he can tap into the latent ring energy he’s absorbed over the years to manually enter the state. The most common method of him transforming into Super Sonic however, is through too much stress! On multiple occasions, when put under too much stress, whether mentally or physically, or even “being pushed to his limits” Sonic has transformed into Super Sonic. When transforming in this way, Super Sonic simply runs off of the latent Chaos Energy remaining in Sonic’s body… which he has a metric fuckton of. Sonic simply fades back to his base form should Super Sonic run through the Chaos Energy in his body… or just get bored [STCO].

On a few occasions, Super Sonic has even had his body separated from Sonic’s. However, the sheer amount of Chaos Energy within Sonic allowed Super Sonic to manifest a full, physical form, existing as an energy being. However, existing on his own like this causes him to gradually bleed Chaos Energy overtime, and if he doesn’t absorb any in some way, he will eventually die.

Hyper Sonic:

Or Just Sonic, as Tails calls him. Hyper Sonic is the state Sonic was able to achieve after absorbing a ludicrous amount of Pure Chaos Energy. Not negative energy like what turned him into Super Sonic, but Pure Chaos Energy, not evil nor good, which allowed Sonic to harness it and do what he wished to with it.

Hyper Sonic is ludicrously powerful, likely just as, if not possibly even stronger than Super Sonic due to the amount of Chaos Energy absorbed, a combination of the Complete Chaos Emeralds, the Master Emerald, and the Chaos Tap’s totality, with a statement from the writer even implying that he had absorbed all the Chaos Energy in the “planet/galaxy/universe whatever”, and the Data Zone states that he tapped into “previously unseen power”, signifying it was a monstrous amount of power attained in this form. Sonic being able to enter this state at any point is dubious, as the massive amount of Pure Chaos Energy available when he attained the state isn’t something that’s likely easy to replicate, though it's likely not impossible, just very unviable in a fight scenario.

Merged Sonic:

Less a form and more a state of being, but in Exit: Sonic, the chronological final STC story to ever be told, Sonic is merged with Super Sonic by having their quantum wavelengths aligned, causing them to finally, permanently be merged into one being, with Super Sonic’s evil personality vanquished and gone forever, Sonic now the only one, and finally healed.

Presumably, Sonic, having merged with Super Sonic, a being of pure, unbridled Chaos Energy, would likely have access to all his powers and be comparable in stats, as they’re just flat out the same person now. However, it is ultimately speculative, and there’s no way to be fully proven for sure, as STC as a whole ends immediately after these events.

Kasen Ibaraki:

Ibaraki-Douji:

Ibaraki-Douji is the evil, malevolent personality once carried within Kasen Ibaraki back when she was one of the Four Devas of the Mountain, a monster who killed and pillaged as she pleased, acting as a true, proper Oni, one of the most powerful and respected of them all. That is, until her arm was sliced off and sealed by the powerful blade Onikirimaru, which simultaneously forced all of Kasen’s malice into said arm. This process resulted in all the collected malice to congregate within the arm, developing into its own personality and individual, that being Ibaraki-Douji’s Arm. Ibaraki-Douji essentially represents the evil being Kasen used to be, never changing its ways and remaining as a purely evil, malicious entity intent to be a “proper” Oni, gladly killing and consuming any humans she comes across.

The arm, after being unsealed, is capable of constituting it's own body, described as a “non-existent real form”, looks nearly identical to Kasen, just with a slightly different outfit, more rough, ragged hair, having both her arms with long claws, and medium length oni horns.

Deva Kasen:

The true, original state of Kasen Ibaraki, back when she was one of the Four Devas, able to be created through the re-union of Kasen, as well as Ibaraki-Douji’s arm into the same body. However, after the separation of their beings caused by the severing of her arm, and the subsequent thousand years to allow both to develop into wildly different people, they no longer share one mind, instead being two minds existing within the same body.

In this state, Kasen is ludicrously powerful, having had the full might of her Oni strength restored, and become even more powerful through the merger of their bodies, to the point that she’s borderline undefeatable to Reimu. This comes at a cost however, as due to being of two minds, they essentially exist in turmoil with one another, as Kasen no longer aligns herself with the evil nature she used to have, having grown and changed across her thousand years of separation, and naturally, works against Ibaraki-Douji. However, Ibaraki-Douji is able to take full control of Kasen’s body, and act out her violent and malicious ways more easily.

Abilities & Haxx:

Sonic:

Bodily Weaponry and Body Control:

Sonic’s spines are sharp, dangerous weapons he can use against his opponents by spinning into a ball and slamming into them with his spin attack, and various other ways. He’s also a complete master at manipulating his body, able to twist and contort it in a variety of ways, with his spin dash being the most iconic example.

Underground Mobility:

Sonic can use his spinball abilities to burrow through the ground like a hedgehog.

Afterimage Creation:

Sonic can move so fast that he creates after images just from moving, which he can even use to try and disorient opponents.

Vibration Manipulation & Forcefield Creation:

Fleetway Sonic’s most unique and notable ability, would be his vibration manipulation. As seen above, Sonic can vibrate the air molecules in front of him at sonic speeds in order to create attack-repelling force fields (his Insta-Shield!). He can cause earthquakes just by running, move at super speed to cause a robot to vibrate into pieces, can disorient people by rapidly vibrating them, can loosen bindings such as ropes by vibrating the part of his body that’s tied, and even weaken the molecular structure of things, allowing him to bust out of most bonds [STCO].

Air & Wind Manipulation:

Through his speed, Sonic is able to manipulate the air and wind in many ways. He can rotate his arm quickly enough to create powerful windblasts capable of funneling gas away, as well as move fast enough that he can create tornadoes capable of putting out large fires, tear apart structures from within, create wind funnels, or even create a “Speed Cocoon” capable of suppressing a city destroying missile’s explosion. He could even run fast enough to create a vortex that let him reverse the rotation of a massive drill. Even Sonic’s slipstreams are notable, as he’s used them to suck up and redirect crossbow bolts. As Super Sonic, he was even able to hyper compress lava in order to turn it to stone.

His wind vortexes are even able to take advantage of the surrounding environment, creating small sandstorms or snow vortexes. His Speed Cocoons can even manage to redirect electricity. He’s even able to create a wind vortex strong enough to lift an entire moving train while it was moving at top speed, and pull it backwards off the tracks it was moving on [STCO].

Water Running:

He can run on water. Pretty simple.

Heat & Fire Manipulation:

While rather limited in application, Sonic can manipulate fire through sheer speed, being able to superheat sand into glass just by running on it, as well as run fast enough to cause enough friction to create intense heat [Novels] or bursts of fire. It’s also noted that if he’s not careful, he can build up enough static from moving fast enough to accidentally launch sparks around and light things on fire [Novels].

Resistances:

Poison Manipulation: Sonic has a multitude of showings in regards to poison manipulation:

Sonic can endure being hit by the spikes of Caterkillers, which are stated to be coated in a “lethal poison”. [Game & Novels]
Sonic can endure being submerged in Mega Mack for an extended period of time, despite the fact that Mega Mack was engineered to be incredibly toxic and corrosive by Robotnik. Originally utilizing Hydrogen Sulfide, an already lethally dangerous chemical, Robotnik deemed it too ineffective, and moved onto more toxic substances, eventually creating Mega Mack, which is so corrosive that it kills any living entity submerged in it within a minute, and even barrels that would be used to contain Mega Mack would be dissolved within hours. [Game & Novels]
Sonic can endure a specially engineered version of Mega Mack, the monster Megatox, which was designed expressly to kill him. He was able to completely submerge himself in it for a time, though did become dizzy from the process.

Megatox came back later on, having spent his time growing larger and even more powerful, and thus, more deadly. Sonic, despite being soaked in the poison repeatedly, he did not die. While he did begin to feel the effects of the poison by the fight's end, becoming ill and his vision going haywire, he nearly immediately recovered as soon as he wasn’t exposed to it.

Mind Manipulation: Sonic has entirely too many showings of resistance to mindhaxx.

Limited Memory Manipulation: Was able to recall all his memories after suffering amnesia from a severe impact through the simple act of hearing his name.

Fear Manipulation: While initially affected by Chaos’ Fear Manipulation, after the death of Johnny Lightfoot, Sonic learns to focus on his own intense emotions (such as rage) to resist the effects of fear manipulation, and power through it, even against the heavily enhanced Perfect Chaos. While he still feels the fear, he cannot be frozen by it.

He uses this same technique to fight off his fear of spiders [STCO].

Electricity Manipulation: Has tanked lightning on multiple occasions, and could endure being fully electrocuted by a past version of Robotnik and be relatively unharmed after [STCO].

Sealing: Was able to break out of the Omni-Viewer’s hold, which is capable of sealing opponents within him. [STCO]

Super Sonic:

“HAHAHAHAHAHAHAHAHAHAHAHA!!! LET ME SHOW YOU WHAT A REAL HEDGEHOG IS CAPABLE OF!”

Flight:

Super Sonic can freely fly around with no issue, even able to do so to and from space.

Chaos Energy Absorption:

One of Super Sonic’s most common abilities is absorbing Chaos Energy, he’s an absolute fiend for the shit. If anything has a large amount, or any amount of Chaos Energy within it, Super Sonic can freely absorb the energy from it for himself, even gaining the wielders' powers in the process, such as when he absorbed Omni-Viewer’s Chaos Energy and gained the ability to use Chaos Control from it [STCO]. His most notable example however, would be when he jumped into Perfect Chaos, an entity who had absorbed all the Chaos Emeralds and gained their full power… and absorbed all of his Chaos Energy.

Energy Projection:

Super Sonic’s absolute favorite hobby, blasting fuckers with eye lasers. He does it all the time, constantly, way too often. If I listed all the times he has we’d be here all day. He’s also capable of releasing AOE energy bursts.

Forcefield Creation:

Super Sonic can create barriers around his body to protect himself from attack [STCO] as seen above, and can also create large protective force fields to protect others… just so he can kill them himself later. The Chaos Emeralds also allow the Floating Island to generate a large protective barrier.

Teleportation:

Super Sonic learned how to use Chaos Control, a teleportation technique. [STCO]

Explosion Generation & Fire Manipulation:

He can freely create massive explosions from his body, which leaves behind large swathes of fire in his wake.

Low-Godly Regen:

Super Sonic was able to manifest himself a full physical body after all the Chaos Energy that made him up was ejected from Sonic’s body, essentially regenerating from a state of pure energy. God Robotnik, who’s powered by the Complete Chaos Emeralds like Super Sonic, was also able to regenerate his physical form in a completely different location after his previous body was obliterated.

Electron Bomb Blast:

Super Sonic was able to supercharge himself into an electron bomb, and created a massive explosion which released a planet wide EMP. This one ability has various effects, which will be broken down below:

Heat Manipulation: The heat he generated from charging up from this blast was in the millions of degrees, and resulted in the asteroid he inhabited resembling the sun.
Electromagnetic Radiation Manipulation: The process is described as becoming an “electron bomb”, and generates massive amounts of electromagnetic radiation.
Explosion Generation: He releases a massive explosion, duh.
Technology Manipulation: The blast releases a massive electromagnetic wave which encompasses the entirety of Mobius, disabling and shutting down every piece of modern technology invented by Robotnik in the process.

Chaos Energy Scaling Abilities:

There’s a large number of abilities that have been granted by or performed by wielders of the Chaos Emeralds, or the Chaos Emeralds themselves that Super Sonic himself has never actually performed. While that may cast doubt on his ability to use them, considering these powers are granted to their users explicitly from Chaos Energy/The Chaos Emeralds themselves, and Super Sonic is powered by that same energy himself, there’s no real reason he WOULDN’T be able to access them. Anything excluded for Super Sonic will be noted in Before the Verdicts.

Time Travel & Age Manipulation:

God Robotnik was able to nearly instantly travel forwards and backwards in time, and is able to forcefully drag others alongside him, such as when he traveled 65 years into the future in an instant to age Sonic to the point of being elderly, before traveling back to the current day. He could likely still age someone forwards and backwards in time without utilizing time travel, however. The Chaos Emeralds were also used by the Echidna to send Sonic back to his proper place in time.

Power Nullification:

Was able to nullify Sonic’s speed and skill, preventing him from using any of his combat abilities, these abilities can also be returned/un-nullified

Telekinesis:

God Robotnik used telekinesis to throw Knuckles across the room by simply pointing at him.

Duplication:

God Robotnik could create duplicates of himself.

Intangibility:

God Robotnik could turn intangible, causing Sonic to phase right through him. He can also pair this trick with some teleportation for funny gags.

Shapeshifting & Transformation:

God Robotnik can easily alter his body’s shape and form, such as transforming it to an extra durable crystal-like form. He was also able to take many different forms while reshaping the universe to his whim to toy with Sonic.

Transmutation:

God Robotnik can transmute beings to stone, and has also used the Emeralds’ power to turn Tails into glass.

Mind Control & Possible Dream Manipulation:

God Robotnik is able to easily brainwash and control the minds of others, such as when he manipulates Knuckles’ mind to make him a devoted servant, or how every creation or summon of his is loyal to him. It’s also implied he employs some kind of manipulation of dreams upon those he brainwashes, as upon being released from Robotnik’s mental control, Knuckles notes he was having a strange dream (it is entirely possible that this is just him perceiving his previous mental state as a dream, it's unclarified).

Size Manipulation:

God Robotnik could alter his own size to be large enough to be able to hold the entirety of the Floating Island in his hands, or to dwarf the planet of Mobius to the point he could hold it in his hand. The energy of the Chaos Emeralds were also able to shrink Robotnik to subatomic sizes.

Dimensional Travel & BFR:

Robotnik sends Sonic to the Special Zone, which is a completely different universe, and also travels there himself.

Acausality (Type 1):

God Robotnik, despite being able to rewrite and erase history, to the point that he changed the events of his past making it so that Sonic never existed, which would have resulted in him never becoming Robotnik, still exists, making him immune to time paradoxes.

Summoning/Creation:

God Robotnik could summon/re-create several characters from across the Fleetway series, even characters that were canonically dead, and could forcefully control them to do his bidding. He was able to summon/create Metallix Mark I, Megatox, Plasma, Arnhem Abacus (who exists solely to control Plasma), Commander Brutus, Metamorphia, and he could likely summon any other characters in the series, so long as he can visualize them. Meaning entities that he has created such as Metallix Mark II, Knuckles Metallix, many of his machines, and even the Death Egg could easily be summoned. Some of these characters have specific abilities of their own, which will be listed down below:

Poison Manipulation & Intangibility - By summoning Megatox, a being made of Mega Mack, a poison specifically designed to kill Sonic, though it could likely poison other living beings. As a being made of pure liquid he also cannot be touched by regular means.
Energy Manipulation & Intangibility - By summoning Plasma, who is a being made of pure electrons and positive ions. As a being of pure energy, he cannot be touched by regular means.
Electricity Manipulation, Energy Projection & Enhanced Senses - By summoning Metallix Mark I, who can manipulate electricity via shooting electrical blasts and can encase himself in an electric force field. He also can shoot lasers from his chest cavity that are capable of creating fires, and has infrared vision.
Energy Absorption, Energy Projection & Elasticity - By summoning Metallix Mark II, which has all the prior abilities of Metallix Mark I (energy blasts included), alongside the ability to absorb Chaos Energy to empower himself, and can extend its limbs.
Energy Projection - By summoning Knuckles Metallix, which can shoot a death ray from his chest cavity. God Robotnik should also be capable of summoning the Death Egg, which can shoot a massive laser beam capable of destroying zones.

While God Robotnik, and by extension, Super Sonic, could likely summon/recreate almost any other character in the Fleetway Universe, listing all of all of the characters in Fleetway and their abilities would be a complete pain in the ass, and would kind of be going far beyond the matchup itself, and such summons happening at all would be quite unlikely. It’s also unlikely that Super Sonic would know to summon every character in the verse, as he wouldn’t have the experience or memory of them to be able to visualize them in the first place.

Warping:

Perhaps the most impressive, powerful, and multi-faceted ability of Chaos Energy, is its ability to warp things. Chaos Energy is able to warp reality on a fundamental level in a variety of ways, such as:

Reality Warping: God Robotnik was able to completely rewrite, recreate, and alter the entire universe and Special Zone and their histories several times over, warp entire locations to be completely different, rewrite or erase people from history, or alter their histories or minds to be subservient to him. Anything he imagines could be brought to reality, he could “do anything”, he could destroy people with a thought, as well as many more effects. Perfect Chaos was also able to immediately begin warping reality after absorbing the Chaos Emeralds, using them to warp Robotnik’s stronghold into something befitting his image.

Law Manipulation, Chaos Manipulation, Corruption, Physics Manipulation, Matter Manipulation (Atomic), and Causality Manipulation: Had Arctur's plan succeeded, he would have used the Incomplete Emeralds to alter the very nature of the Big Bang and all of existence through the concentrated chaos within the Emeralds. Every "particle in the universe, every atom of every sun, every molecule of every planet, every fiber of every living thing" and more would be infected with chaos to give birth to a different universe.

Data Manipulation and Type 2 Information Manipulation: The Chaos Wave would have rewrote and affected Cyberspace, an infinite realm of information made of raw machine code, where data is the building blocks of reality, where the sky is filled with constellations and data clusters, the world consists of only data, where “pure electronic information” forms into shapes, where digital mist can solidify into waves of shifting space, where there exist literal “blocks of information” . Effectively, Chaos Energy can warp, affect, and attack things down to the level of their very data / information.