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I'm done being controlled by yesterday. I'm going to live for tomorrow.

— Mecha Sonic Mark II, Sonic the Hedgehog: Scrapnik Island #4

Mecha Sonic Mark II,[5][6] also known as simply Mecha Sonic[7] (メカソニック[8][9] Meka Sonikku?) is a character that appears in the Sonic the Hedgehog series. He is a powerful robot built by Dr. Eggman that served the doctor during the second part of the Angel Island incident, and an improved model of the second Mecha Sonic.[6]


Mecha Sonic

Mecha Sonic Mk. II, from Sonic & Knuckles.

Mecha Sonic Mk. II is a robot built in the image of Sonic; thus, he is mostly built out of blue metal, with light blue-colored metal on his belly and muzzle. His head has metal fins designed like Sonic's quills and a pair of triangular "ears". Mecha Sonic Mk. II's feet are red-colored with a white stripe in the middle, resembling Sonic's shoes. He also has a horizontal optic sensor as eyes and a rectangle nose, bearing a resemblance to the original model.

In the IDW comics, set after his defeat in Sonic & Knuckles, Mecha wears an old white cloak, while the color of his body faded from blue to a rusty orange (except two places where the original painting is visible), and his broken limbs have been replaced with spare parts of other Badniks: the right arm was replaced with a Crabmeat's arm, and his left leg with a circular saw from a Mecha-Bu.



Sonic 3 & Knuckles[]

In Sonic & Knuckles, and the lock-on game Sonic 3 & Knuckles, Mecha Sonic Mk. II was given the directive "DESTROY SONIC THE HEDGEHOG"[10] by Doctor Eggman. He fought Sonic and Tails at the Sky Sanctuary, where he piloted Dr. Eggman's Egg Mobile during two failed attempts to defeat the duo. After failing to destroy them, Mecha Sonic Mk. II fought against the heroes himself, but was ultimately defeated.

After barely surviving his encounter, Mecha Sonic Mk. II began planning an attack on the Floating Island. As such, he made an EggRobo his subordinate and send him to the Floating Island to defeat Knuckles.[8] However, all of these attacks ultimately failed, as Knuckles was able to survive following these encounters. In Sky Sanctuary Zone, Mecha Sonic Mk. II ended up accidentally destroying the EggRobo when Knuckles escaped the latter's grasp while Mecha Sonic Mk. II tried hitting him with his Spin Attack. He proceeded to battle Knuckles himself, but was defeated. However, Mecha Sonic Mk. II was still not entirely destroyed, and rushed to the stolen Master Emerald which he used to attain a Super State to defeat Knuckles with. Despite the odds though, Mecha Sonic Mk. II was ultimately defeated while Sky Sanctuary Zone began to crumble. Fortunately, Knuckles escaped with the Master Emerald thanks to Sonic saving him in the Tornado.

Other game appearances[]

Blue Sphere[]

In Blue Sphere, Mecha Sonic Mk. II appears on the difficulty screen, where he represents the sixth difficulty level of the game.

Minecraft Sonic Texture Pack[]

In the Sonic Texture Pack for Minecraft, Mecha Sonic Mk. II (referred to simply as "Mecha Sonic") appears as a boss, where he replaces the Wither boss from the original game, and essentially serves as a model-swap of it. Notably, the version of Mecha Sonic seen in the texture pack has a unique design which incorporates elements of other "Mecha Sonic" units as different parts of his body. These parts include the right arm and left foot of Mecha Sonic Mark III, the head and claw of Sonic the Hedgehog 2 (8-bit)'s Mecha Sonic as the left shoulder and tail respectively, the back spikes of Sonic the Hedgehog 2's Mecha Sonic as the right shoulder, and rockets and a spine on the back from Mecha Sonic Model No.29. Although only referred to as "Mecha Sonic" in-game, this new design was internally known as Mecha Amalgam[11].

When Mecha Sonic is summoned, he appears in a rusty grey color, similar to the Scrapnik Island variation of his IDW appearance. During the fight, Mecha Sonic sports the exact same attack pattern as the Wither, albeit with the visual change of launching energy blasts in place of Wither Skulls. When the boss reaches half health, Mecha Sonic will transform into Super Mecha Sonic Mark II, and the other parts will turn a similar gold color to indicate the change. Upon defeat, Mecha Sonic will explode, and drop a Nether Star, which has been re-textured to resemble his "eyeball" when he's charging up with the Master Emerald's power. The mobs killed by him drop a Wither Rose re-textured to what seems to be a flower infected by the Metal Virus or the flower he takes care of in Scrapnik Island.

In addition, the player receives a cosmetic item of Mecha Sonic's visor when purchasing the pack.


Mecha Sonic watering the flower

Mecha taking care of a flower, putting his hopes in it, from Sonic the Hedgehog: Scrapnik Island #2.

Like his "sibling", Mecha Sonic is a silent, no-nonsense adversary. In the games, his personality beyond this is not shown.

In his appearances in the IDW comics, unlike Metal Sonic, Mecha Sonic decided to become a protector for the inhabitants of Scrapnik Island and not dedicate his existence to fight Sonic the Hedgehog or serve Dr. Eggman thanks to Sigma's reprogramming.[3] However, because his reprogramming was insufficient, Mecha's original programming was kept in-check by the robot's own strength of will.[12]

Mecha would be a silent guardian to Scrapnik Island, with the hopes of one day leaving that forsaken place. Mecha would put his hopes on a sunflower that washed ashore somehow, with the dream of planting it on real soil one day.[3]

Mecha Sonic's battle with Mecha Knuckles, however, caused many of his old protocols and subroutines to reawaken. Sigma states this had caused his cerebral processors to be warped. He became willing to harm his fellow Scrapniks without hesitation. The old programming would reveal Mecha Sonic to have an inferiority complex, angry to be considered "trash" by his creator and enemies.[3] Mecha Sonic had hoped the doctor would find him and repair him so both could conquer the world. Becoming resentful when he realized Eggman had abandoned him to rust, Mecha now desired to become Sonic himself by taking over his body[12] and escape Scrapnik Island by running on water.

Powers and abilities[]

Mecha Sonic Mk. II is quite agile in movement; by using his mechanic feet, he can achieve high-speed dashes in forward and opposite directions,[4] and can also perform very high jumps. He is very strong as well, having gone up against powerful warriors like Knuckles, and has even been able to effortlessly destroy the Egg Mobile by accident.

It is worth noting that Mecha Sonic Mk. II is a highly durable robot. He has been able to survive battles against Sonic and Tails, falls from high up into the sky, and even devastating blows from Knuckles. In all of these cases, Mecha Sonic Mk. II only stood deactivated for a few seconds before being active again.

Mecha Sonic Mk. II's core offensive maneuver is the Spin Attack,[4] a technique where he curls into a concussive ball or cutting disk and directs himself at his targets. Highly adept in his usage, Mecha Sonic Mk. II can utilize several variants of the Spin Attack for both grounded and aerial maneuvers, like the Spin Dash and the Spin Jump. Additionally, combined with his agility, Mecha Sonic Mk. II can perform lethal attacks such as high jumps, quick dashes, or a combination of both.

Mecha Sonic Mk. II has some skill in operating vehicles, though the extent of it remains unknown. So far, he has been able to drive modified versions of the Egg Mobile.


Super Mecha Sonic Mk. II[]

By harnessing the Chaos Emerald energy of the Master Emerald, Mecha Sonic Mk. II can enter a Super State, transforming him into Super Mecha Sonic Mk. II. In this form, Mecha Sonic Mk. II's powers greatly surpass his normal ones, and he is virtually invulnerable. However, this form requires a constant supply of the energy from the Master Emerald to be sustained.


The new and improved model of the behemoth that Sonic destroyed in Sonic the Hedgehog 2.

— Description, Sonic the Hedgehog Encyclo-speed-ia

Mecha Sonic Mk. II is the boss of Sky Sanctuary Zone in Sonic & Knuckles and Sonic 3 & Knuckles. As Sonic, he is the thirteenth boss overall in Sonic & Knuckles, and the twenty-fifth boss in Sonic 3 & Knuckles; while as Knuckles, he is the ninth boss overall in Sonic & Knuckles, and the twenty-first boss in Sonic 3 & Knuckles. In Sonic & Knuckles, he is fought by either Sonic or Knuckles, while in Sonic 3 & Knuckles, he can also be fought by Tails, either by himself or as Sonic's partner. In Sonic Origins Plus, he can also be fought with Amy.

Boss guide[]

In Sonic's version of Sky Sanctuary Zone, Mecha Sonic Mk. II is the last boss of the Zone, appearing without any Egg Mobile add-ons unlike his previous attempts. The battle in Sonic's story takes place in a wide arena next to a tall tower, which is accessed by using a Warp Point below the arena. After transporting to the arena, Mecha Sonic Mk. II dashes across the arena while destroying the Warp Point, forcing the player to defeat the mechanized robot in order to reach to the Death Egg. When Mecha Sonic Mk. II reveals himself at the end of Knuckles' story, he destroys Eggrobo and is ready to face the echidna himself while the Floating Island is seen slowly swaying downward in the background. Battles on both stories are identical.

Mecha Sonic Mk. II's attacks are loosely similar to those of the previous Mecha Sonic from Sonic the Hedgehog 2 (16-bit). For the first attack of his pattern, Mecha Sonic Mk. II starts off by making a medium-sized jump while spinning from the corner to the center of the arena, does his variation of the Spin Attack along the ground to the corner and then spins vertically upwards, then returns back to his idle standing position on the ground for a moment. In the second one, he jumps and dashes horizontally in midair to reach the other side and landing in the other corner, assuming his standing position for a moment. During the third pattern, Mecha Sonic Mk. II does a small leap to the arena's center in his spiky ball mode before doing a larger leap that launches him to the other corner. After that, he spins in mid-air for a second before he lands in his standing position for a short time. From then on, Mecha Sonic Mk. II's attack pattern repeats.

The player must watch out during the end of some of the attacks, because after landing in the corner, Mecha Sonic Mk. II may squat down and dash backwards to the other corner before standing upright, attempting to poke the player with his spines as he dashes backwards. The only moments the player can hit Mecha Sonic Mk. II is when he is not spinning. During both fights, Mecha Sonic Mk. II takes eight hits to defeat, as after that, he kneels down and starts to short circuit as electricity crackles across his body.


  • In Sonic Origins, the encounter with Mecha Sonic Mk. II in Knuckles' version of Sky Sanctuary Zone is modified as follows:
    • The HUD leaves during the cutscene where Mecha Sonic Mk. II attempts to attack Knuckles, and returns afterward. Additionally, when playing as Knuckles, the Eggrobo is given a proper death animation and the player is granted 100 points from it.
    • If Sonic and/or Tails access Knuckles' version of Sky Sanctuary Zone via the Level Select and Debug Mode, the cutscene is adjusted for both characters. Instead of Eggman being defeated like in the original game by Mecha Sonic Mk. II, his Egg Mobile is destroyed while he falls off the Zone with modified sprites from Sonic Mania. Sonic Drop Dashes to the right instead of "gliding" like Knuckles. Tails, however, flies to the exact middle of the cutscene just like where Knuckles usually glides.
  • Sonic/Tails' version of the fight with Mecha Sonic Mk. II, alongside the Final Weapon are the only major bosses in Sonic 3 & Knuckles that is not present in the Boss Rush mode in Sonic Origins.


Name Artist(s) Version Length Music Track
"Boss 2" (Sonic) Sega Sonic & Knuckles/Sonic 3 & Knuckles 1:14
Sonic & Knuckles Collection "FM Synthesizer" 1:09
"General MIDI" 1:05
"Final Eggman" (Knuckles) Sonic the Hedgehog 3/Sonic 3 & Knuckles 1:50
Sonic & Knuckles Collection "FM Synthesizer" 1:42
"General MIDI" 0:57


This robot was not named in any instruction manuals accompanying Sonic & Knuckles, but the description on the back of the U.S. release box originally referred to him as "Metal Sonic".[2] In Japan, he was named "Mecha Sonic" (メカソニック) in two guide books: Sonic Jam Official Guide and Sonic Mega Collection Strongest Strategy Guide.[8][9] A third, unique name, "Evil Sonic", was used to describe him in a Sonic The Comic Q Zone.[1]

"Mecha Sonic" was later confirmed as his name in the backstory for Sonic the Hedgehog 4: Episode I, released in the Story section of the official English-language website, implying that this Mecha Sonic is directly rebuilt from Sonic the Hedgehog 2.[7] This name was updated again in Sonic the Hedgehog Encyclo-speed-ia, which, in addition to strictly confirming him as an upgrade from the Sonic the Hedgehog 2 model, refers to him as "Mecha Sonic Mk. II",[6] a name that would be corroborated by Sonic Origins.

In other media[]

Books and comics[]

Archie Comics[]

Main article: Mecha Sonic (Archie)
Mechasonic Archie

Mecha Sonic, from Sonic Super Digest #12.

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Mecha Sonic was used for Dr. Eggman's invasion of Angel Island. While it failed to stop Sonic, Dr. Julian Snively used the robot to try to steal the Master Emerald.

Sonic the Comic[]

A Metallix robot based on Mecha Sonic Mk. II appeared in Sonic the Comic's adaptation of Sonic & Knuckles. He stole the Master Emerald from the Hidden Palace Zone and was followed by Sonic and Knuckles to the Sky Sanctuary Zone. As in the game, he super-charged himself with the Master Emerald's energy, becoming invincible. However, he was defeated by Super Sonic when Sonic tried the same trick.[13][14]

IDW Publishing[]

MechaSonic (IDW) abandonned

Mecha Sonic, discarded and abandoned, from Sonic the Hedgehog: Scrapnik Island #2.

In the Sonic the Hedgehog comics by IDW Publishing, for some time, Mecha Sonic was considered to be Eggman's "most prized and remarkable creation". However, after his defeat on Angel Island he eventually ended up on the shore of Scrapnik Island, forgotten by Eggman. He was fixed and reprogrammed to not be hostile by E-117 Sigma, and became a guardian for the island.[3][12]

After being rebuilt by Sigma, he waited for his creator for days, certain that Eggman would come back for him. Alas, he never came, thus Mecha Sonic became a "Scrapnik" alongside other Badniks and peacefully lived on the island, which will eventually be called "Scrapnik Island".[12]

During his time on Scrapnik Island, he would help build up a civilization, and would also come to care for a flower that washed up on shore one day.

Scrapnik Island[]

After an injured Sonic wakes up in the ruined Death Egg, he would eventually come across a room containing the flower Mecha Sonic was caring for, with Mecha Sonic watching from the shadows as he leaves. After Sonic finds the other Scrapniks, he would quite literally bump into Mecha Sonic, immediately recognizing him and assuming he's a threat. Mecha Sonic and the other Scrapniks pursue Sonic through the Death Egg until the latter reunites with Tails, who tells him that the Scrapniks aren't a threat. Mecha Sonic follows alongside E-117 Sigma as he leads Sonic and Tails out of the Death Egg and introduces them to Scrapnik Island. Sigma and Tails go on ahead while Mecha Sonic stares at Sonic, who glares back at him before also leaving. Mecha Sonic suddenly and momentarily malfunctions before following the others.[15]

Mecha Sonic accompanied Benedict, Florentine, Rancheros and Sigma in bringing information about the Tornado's damages to Sonic and Tails. When Tails shows Sigma the translator he installed on his Data Pad, Mecha Sonic notices and stares at it for a few moments. Sigma informs Sonic and Tails that they need to go to the Death Egg to find a spare part, and Sonic decides to tag along, though he gives Mecha Sonic another glare. Mecha Sonic takes Sonic and Sigma on a small detour to water the flower, with the latter explaining that Mecha Sonic hoped to one day plant it in real soil. Mecha, Sonic and Sigma later arrive at the abandoned Egg Carrier, and Sigma splits up with Mecha and Sonic to find the part they need.[3]

Mecha destroys Mecha

Mecha Sonic Mark II destroying Mecha Knuckles, from Sonic the Hedgehog: Scrapnik Island #2.

As they search, Sonic apologizes to Mecha Sonic for their rough introduction and previous conflicts, putting out his hand and suggesting they have a fresh start. Mecha Sonic reaches to shake Sonics hand, but suddenly grabs him to avoid an ambush from Mecha Knuckles. They attempt to flee Mecha Knuckles and run into Sigma, who tries to calm Mecha Knuckles, only to be attacked and knocked unconscious. An enraged Mecha Sonic grabs Mecha Knuckles and drags him across the floor before throwing him into a wall, but Mecha Knuckles retaliates by hitting him in the head. This causes Mecha Sonic to malfunction and hallucinate seeing Angel Island, as well as horrific visions of Sonic, Knuckles and Eggman mocking him and calling him trash for his failures. These hallucinations cause Mecha Sonic's subroutines to reactivate, leading him to grab Mecha Knuckles before destroying him with a Spin Attack, to which an unnerved Sonic thanks him and offers a high five.[3]

Mecha Sonic turns and grabs Sonic, taking him to another room in the Death Egg and hooking him up to a machine as Sonic asks why he would go back to being evil. Mecha Sonic uses a computer to spy on Tails, focusing on his Data Pad as Sonic sarcastically asked if he was planning on sucking out his brains. Ben witnesses the scene and goes to warn Tails, who forms a search party with Benedict, Florentine and Rancheros and finds Sigma and Metal Knuckles, with the former telling Tails that he failed to completely remove Mecha Sonic's original programming, and that his old subroutines have reawakened and are preventing him from thinking straight. Mecha Sonic would then ambush the group, kidnapping them one by one until Tails was alone. Mecha Sonic speaks through Tails's Data Pad, venting his anger towards Dr. Eggman for being abandoned and forgotten, and commanding tails to hand over the data pad. Tails refuses and attacks Mecha Sonic, but despite his efforts, Mecha Sonic easily overpowers him and steals his Data Pad before shoving him down a garbage chute, telling him that now he gets to know how it feels to be thrown away.[12]

Mecha Sonic returns to the room where Sonic is being held, hooking up the Data Pad to the computer and telling Sonic that Tails was where he belonged. When Sonic asks about the machine, Mecha Sonic explains that Eggman once experimented with a machine that would let him control his badniks with his mind but gave up just as he figured it out. Mecha Sonic's plan was to repurpose the machine to download his mind into Sonic's body, allowing him to escape Scrapnik Island and get revenge on Eggman. Sonic ridicules him for abandoning the Scrapniks like Eggman did to him, but Mecha Sonic retorts that they weren't his friends, shocking and saddening a group of Scrapniks secretly watching from above. Mecha Sonic activates the machine and begins the mind transfer, but the Scrapniks intervene and destroy the machine before it can finish the process.[10]

In a fit of rage at his failure, Mecha Sonic begins attacking the Scrapniks as some of them help Sonic recover. Even though the machine didn't fully complete the mind transfer, it gave Sonic access to Mecha Sonic's thoughts and emotions, as well as pieces of his memories. Upon seeing Mecha Sonic attacking the Scrapniks, Sonic attacks Mecha and they begin racing down the corridors of the Death Egg. Mecha Sonic also hears Sonic's thoughts, telling him that he doesn't know what pain is when Sonic thinks about his injured ankle. He tells Sonic that even though the latter defeated him before, he was alone, wounded and at his limit. Sonic begins speeding up in response as they race towards the Death Egg's incinerator, running across the walls as they fight.[10]

Sonic eventually gains the upper hand and kicks Mecha Sonic in the head, knocking him back to his senses as they both land in the scrap being dragged into the incinerator. Sonic tries to grab Mecha Sonic's hand, but Mecha Sonic knocks his hand away, lamenting his envy of Sonics freedom and his own failure of every directive he's been given, dismissing himself as worthless trash. Sonic tells Mecha Sonic that he's the only one that can give himself value, and living for himself is what it meant to be free. Mecha grabs Sonic's hand when he offers it again, but Sonic is unable to pull them out due to his injured leg, with Mecha Sonic sarcastically remarking how Sonic couldn't actually save them despite his big talk. However, Tails, Sigma, Mecha Knuckles and the other Scrapniks return and form a chain to pull Sonic and Mecha Sonic out. The Scrapniks then crowd around Mecha Sonic to celebrate, with Sigma also apologizing for his ignorance about Mecha Sonic's inner turmoil. Despite not being physically capable of doing so, Mecha Sonic was crying with joy through Sonic.[10]

Later, Tails completely removes Eggman's original programming from Mecha Sonic and Mecha Knuckles. As Sonic and Tails prepare to leave Scrapnik Island, Mecha Sonic thanks Sonic for teaching him that the value of existence isn't determined by success or failure, and despite the uncertainties of life, he will stop being controlled by the past and begin living for tomorrow.[10]


E-117 Sigma[]

E-117 Sigma repaired Mecha Sonic when he first washed up on Scrapnik Island, and they have become good friends since then. They are almost always at each others sides and help each other with various tasks. Sigma cares about Mecha Sonic's well-being and goals, and Mecha Sonic retaliated against Mecha Knuckles when he attacked Sigma.[12]

Mecha Knuckles[]

The relationship between Mecha Sonic and Mecha Knuckles is mostly unknown, but they are clear allies as they are both protectors of Scrapnik Island. Mecha Knuckles also willingly helped to rescue him,[10] so it is possible they are friends in spite of their original programming.

Sonic the Hedgehog[]

Being built based off his abilities and image by his nemesis, Mecha Sonic and Sonic the Hedgehog clashed as enemies in the past, only to be defeated by the latter.[3]

In he IDW comics, they would meet again a long time later when he and Tails crash-land on the destroyed Death Egg on Scrapnik Island and Mecha was initially not hostile towards him thanks to E-117 Sigma reprogramming him.[15] Before they could officially bury the hatchet, Mecha Knuckles intervened and reignited his animosity towards him in a fight that caused his former protocols to start up again.[3] Following this, he would then attempt to become Sonic himself by swapping bodies, although he would only link their minds together thanks to the intervention of the other Scrapniks. They would then proceed to duke it out across the area until falling into the Death Eggs furnace. Despite his hesitance to be saved under the belief that he's useless, he ultimately accepted Sonic's help after being told by the hedgehog that he should fight for himself instead of others. After being rescued by Tails and the other Scrapniks, Mecha Sonic voiced his gratefulness to Sonic for encouraging him to move onward in life, and the two would then part on good terms.[10]

Doctor Eggman[]

After I was rebuilt, I waited for him. I was so certain he would come find me and we would try again. But instead, he abandoned me...left me here to rust on this forsaken junk pile. A grave error on his part...and now, that error shall be corrected.

— Mecha Sonic, Scrapnik Island #3
The ghost of Eggman

Eggman's memory lingering over Mecha Sonic.

Created to be the doctor's enforcer, Mecha Sonic was loyal to Eggman in his quest for world conquest, and the doctor did consider him his greatest creation at the time.

In the IDW comics, After being defeated on Angel Island, however, Mecha was left forgotten. Despite Sigma's attempts to reprogram him, Mecha would hope for Doctor Eggman to rescue him from Scrapnik Island, only to resent him when that wasn't the case.[10]





"It's gone... it's all gone... all my work... Now I'll never get off this island... You ruined everything. I'LL CRUSH YOU!!!"
—Mecha Sonic shouting out his rage against the Scrapniks, Sonic the Hedgehog: Scrapnik Island #4
""Pain"? What do you know about pain? What you’re feeling right now is nothing compared to what I've endured.
There's that voice again! Is it… you?
You've never been cast aside and robbed of your value… Your purpose.
Did that helmet link our brains?!
You may have bested me last time we fought, but not this time. You’re all alone, you’re out of options and you’re wounded. You’ve reached your limit.
—Mecha Sonic and Sonic the Hedgehog, Sonic the Hedgehog: Scrapnik Island #4


Bluemechasonic gale racer

Mecha Sonic Mk. II's cameo in Gale Racer.




IDW Publishing[]

Concept artwork[]


See also[]


  1. 1.0 1.1 Sonic the Comic #44, "Sonic & Knuckles Special Part 2"
  2. 2.0 2.1 "Play as Knuckles and tackle Robotnik and Metal Sonic with bare-fisted attacks, high-speed glides and wall-climbing power!" - Sonic & Knuckles back of the U.S. box.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 Sonic the Hedgehog: Scrapnik Island #2, story one
  4. 4.0 4.1 4.2 Flynn, Ian; Sega (8 December 2021). Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 55. ISBN 978-1506719276. "Boss: Mecha Sonic Mk. II The new and improved model of the behemoth that Sonic destroyed in Sonic the Hedgehog 2. It attacks in three waves: - *In the Sonic the Hedgehog Egg Wrecker - *In the Sonic the Hedgehog 2 Egg Bouncer - *Personally, with high-speed dashes and bouncing Spin Attacks."
  5. Sonic Team (23 June 2022). Sonic Origins. Sega. Area/Level: Boss Rush (Sonic 3 & Knuckles [Knuckles]). "Boss Rush 9/9 - vs. Mecha Sonic Mk. II / Super Mecha Sonic Mk. II"
  6. 6.0 6.1 6.2 Flynn, Ian; Sega (8 December 2021). "Sonic & Knuckles". Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 55. ISBN 978-1506719276. "Boss: Mecha Sonic Mk. II. The new and improved model of the behemoth that Sonic destroyed in Sonic the Hedgehog 2."
  7. 7.0 7.1 Sonic The Hedgehog 4 Episode I (English). Sega. Archived from the original on 30 May 2013. Retrieved on 26 January 2015. "As Knuckles finished his showdown with Mecha Sonic, the real hedgehog chases Eggman through space, ultimately destroying his doomsday plans - with it, the Death Egg saga comes to a close."
  8. 8.0 8.1 8.2 (in Japanese) ソニックジャム オフィシャルガイド. SoftBank. 2 October 1997. p. 93. ISBN 978-4797303377.
  9. 9.0 9.1 (in Japanese) ソニックメガコレクション最強攻略ガイド. Shogakukan. 1 March 2003. p. 180. ISBN 978-4091060907.
  10. 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 Sonic the Hedgehog: Scrapnik Island #4, story one
  11. Post by i-am-3zekiel on Tumblr. Tumblr (20 July 2023).
  12. 12.0 12.1 12.2 12.3 12.4 12.5 Sonic the Hedgehog: Scrapnik Island #3, story one
  13. Sonic the Comic #49, "Count Down to Disaster"
  14. Sonic the Comic #50, "Count Down to Disaster"
  15. 15.0 15.1 Sonic the Hedgehog: Scrapnik Island #1, story one