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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 Mark II,[4][5] also known as Mecha Sonic[6] (メカソニック[7][8] Meka Sonikku?), as Metal Sonic,[2] or the Evil Sonic,[1] is a character that appears in the Sonic the Hedgehog series. It was a powerful robot built by Dr. Robotnik that served the doctor during the second part of the Angel Island incident, and an improved model of the first Mecha Sonic.[5]


Mecha Sonic Mk. II is a robot built in the image of Sonic; thus, it is mostly built out of blue metal, with light blue-colored metal on its belly and muzzle. Its 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. It also has a horizontal optic sensor as eyes.


Sonic the Hedgehog 3 & Knuckles

In Sonic & Knuckles, and the lock-on game Sonic the Hedgehog 3 & Knuckles, Mecha Sonic Mk. II fought Sonic and Tails in Sky Sanctuary Zone, where it piloted Dr. Robotnik's Egg Mobile during two failed attempts to defeat the duo. After failing to destroy them, Mecha Sonic Mk. II fought against the heroes itself, but was ultimately defeated.

After barely surviving its encounter, Mecha Sonic Mk. II began planning an attack on the Floating Island. As such, it made an EggRobo its subordinate and sent it to the Floating Island to defeat Knuckles.[7] 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 its Spin Attack. It proceeded to battle Knuckles itself, but was defeated. However, Mecha Sonic Mk. II was still not entirely destroyed, and rushed to the stolen Master Emerald which it 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 it represents the sixth difficulty level of the game.


Mecha Sonic Mk. II appeared to possess a degree of self-awareness and ability to think for itself; noticeably, after the destruction of the Death Egg, it was able to plot its own attack on the Floating Island to avenge its defeat at the hands of Sonic and Tails. It was also able to conduct a plan to get Eggrobo to chase Knuckles to Sky Sanctuary.[7]

Powers and abilities

Mecha Sonic Mk. II is quite agile in movement; by using its mechanic feet, it can achieve high-speed dashes in forward and opposite directions,[3] and can also perform very high jumps. It 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. It 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,[3] a technique where it curls into a concussive ball or cutting disk and directs itself at its targets. Highly adept in its 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 its agilitiy, 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, it 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 it into Super Mecha Sonic Mk. II. In this form, Mecha Sonic Mk. II's powers greatly surpass its normal ones, and it is virtually invulnerable. However, this form requires a constant supply of the energy from the Master Emerald to be sustained.


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

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 its 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 itself at the end of Knuckles' story, it destroys Eggrobo and is ready to face the echidna itself 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 th Hedgehog 2 (16-bit). For the first attack of its 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 its variation of the Spin Attack along the ground to the corner and then spins vertically upwards, then returns back to its idle standing position on the ground for a moment. In the second one, it jumps and dashes horizontally in midair to reach the other side and landing in the other corner, assuming its standing position for a moment. During the third pattern, Mecha Sonic Mk. II does a small leap to the arena's center in its spiky ball mode before doing a larger leap that launches it to the other corner. After that, it spins in mid-air for a second before it lands in its 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 its spines as it dashes backwards. The only moments the player can hit Mecha Sonic Mk. II is when it is not spinning. During both fights, Mecha Sonic Mk. II takes eight hits to defeat, as after that, it kneels down and starts to short circuit as electricity crackles across its body.


  • In Sonic Origins, the Mecha Sonic Mk. II encounter 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.


Name Artist(s) Version Length Music Track
"Boss 2" (Sonic) Sega Sonic & Knuckles/Sonic the Hedgehog 3 & Knuckles 1:14
Sonic & Knuckles Collection "FM Synthesizer" 1:09
"General MIDI" 1:05
"Final Eggman" (Knuckles) Sonic the Hedgehog 3/Sonic the Hedgehog 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 Saikyou Kouryaku Guide.[7][8] A third, unique name, "Evil Sonic", was used to describe him in a Sonic The Comic Q Zone in the U.K.[1]

Mecha Sonic was confirmed as his current 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.[6] In addition to confirming him as an upgrade from the Sonic the Hedgehog 2 model, Sonic the Hedgehog Encyclo-speed-ia refers to him as "Mecha Sonic Mk. II".[5]

In other media

Books and comics

Archie Comics

Mecha Sonic Mk. II, from Sonic Super Digest #12.

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Mecha Sonic Mk. II was used for Dr. Eggman's invasion of Angel Island. While it failed to stop Sonic, Dr. Julian Snively used Mecha Sonic Mk. II 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.[9]

IDW Publishing

In the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing, Mecha Sonic Mk. II is a robot from another dimension set in the recent past that Sonic once encountered.


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

  • Mecha Sonic Mk. II makes a cameo appearance as a key chain along with several other Sonic characters in the Sega game Gale Racer, the Sega Saturn version of Rad Mobile released in 1994.




See also


  1. 1.0 1.1 1.2 Sonic the Comic #44, "Sonic & Knuckles Special Part 2"
  2. 2.0 2.1 2.2 "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 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."
  4. 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"
  5. 5.0 5.1 5.2 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."
  6. 6.0 6.1 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."
  7. 7.0 7.1 7.2 7.3 (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.
  8. 8.0 8.1 (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.
  9. Sonic the Comic #49 and #50, "Count Down to Disaster"

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