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Sonic Wiki Zone
Sonic Wiki Zone

Sonic must defeat the massive Mecha Sonic before his final showdown against Dr. Eggman in his Death Egg Robot mecha.

— Description, Sonic the Hedgehog Encyclo-speed-ia

Mecha Sonic[4] (メカソニック[5] Meka Sonikku?) is a character that appears in the Sonic the Hedgehog series. It was a robotic copy of Sonic the Hedgehog created by Dr. Eggman, and an improved model of the first Mecha Sonic. It served as the first line of defense aboard the Death Egg during the West Side Island incident.

Concept and creation[]


Mecha Sonic's design based on its sprites (top), and early sketches (below).[6]

Mecha Sonic's creator, Yasushi Yamaguchi, has stated that Mecha Sonic was written as Dr. Eggman's first combat unit to counter only Sonic, unlike other Badniks which were created out of ambition.[7] The robot used imagery from Mechagodzilla and Gigan for its design, making it appear strong and painful.[8] The robot was intended to have many attacks during development, but time constraints resulted in several of its abilities going unimplemented.[8] These included a long laser shot from the eye, homing missiles from all ten fingers, and "Super Gravity Smash", a move where its chest armor would open and fire a gravity bullet that would eventually disappear but would draw in Rings if the player was too close to it.[8] Very early in development, Tails was intended to be trapped inside the robot, but this was too difficult to work into the story so it was scrapped.[9]

Mecha Sonic's spikes that shoot out during the boss fight were not originally intended, so additional reloadable spikes on the back sides of its head were added to its design after the sprites were completed.[8] Despite Sonic the Hedgehog 2 (8-bit) also having its own Mecha Sonic, its existence was unknown to Sega staff during the development, and was merely a coincidence that a similar robot appeared in both games.[10]


Mecha Sonic was a silver, bulky robot model based on Sonic the Hedgehog in terms of appearance. The head structure contained pointy ears, sharp saw-blade quills and a round orange eye on a wide black sclera. The robot also featured a metallic armor with two arms and orange rocket boosters with tires.


Sonic the Hedgehog 2[]

In Sonic the Hedgehog 2, and its numerous ports and remasters, Sonic (and Miles "Tails" Prower in Tails only mode) encountered Mecha Sonic in a large hall right after succeeding to enter the Death Egg. After landing on the other side of the room, Mecha Sonic began having a one-on-one fight with the blue hedgehog, while Dr. Eggman followed the battle from a small hole in the wall. However, Sonic defeated Mecha Sonic, and then chased down Eggman to the doctor's last machine.[4]

Other game appearances[]

Sonic the Hedgehog Pocket Adventure[]

In Sonic the Hedgehog Pocket Adventure, Sonic encountered Mecha Sonic in Aerobase Zone, where the robot model hatched from the rising orange cockpit to fight Sonic once again. However, the fight ended with Mecha Sonic deactivating after crashing through a wall that led to Gigantic Angel Zone.

Mario & Sonic at the Olympic Games Tokyo 2020[]


Mecha Sonic, from Mario & Sonic at the Olympic Games Tokyo 2020.

In the Nintendo Switch version of Mario & Sonic at the Olympic Games Tokyo 2020, Mecha Sonic appears as the boss of the second stage of the Tokyo Sky Flight mini game. It attacks by dashing towards Sonic and Mario, and firing its spines while curled up. It must be defeated by depleting its Health Gauge with the Tornado's gunshots.

Sonic Superstars[]

A skin based on Mecha Sonic makes an appearance in Sonic Superstars, being usable in the game's Battle Mode.

Powers and abilities[]

Mecha Sonic's active quills were able to protect it from attacks from behind. These quills were also useful when the robot performed its own variant of Sonic's trademark Spin Attack. Much like the hedgehog, Mecha Sonic could also dash off from a standstill in its curling ball form akin to the Spin Dash and perform a mid-air jump much like the Spin Jump. Mecha Sonic could fire multiple small spike projectiles while performing the mid-air assault in the curling ball form. With rocket boosters, Mecha Sonic was able to fly or perform rapid, straightforward assaults from the ground.





Mecha Sonic Mk. II[]

Main article: Mecha Sonic Mark II

Mecha Sonic Mark II was an improved version of Mecha Sonic built by Dr. Eggman during the Angel Island incident.[11] In addition to possessing all of the abilities the original Mecha Sonic had, Mecha Sonic Mk. II was more agile, was able to pilot vehicles, and could achieve a Super State with the Master Emerald.

Mecha Sonic Mk. III[]

Main article: Mecha Sonic Mark III

Mecha Sonic Mark III was a further improved version of Mecha Sonic contained within a capsule in the Final Egg.


Mecha Sonic is the first of two bosses in Death Egg Zone in Sonic the Hedgehog 2 and Knuckles in Sonic 2, and the tenth overall boss of the game. The player fights Mecha Sonic as either Sonic or Tails, as Knuckles in Knuckles in Sonic 2 and the 2013 remaster of the game, or as Amy in Sonic Origins Plus. For this boss, the player is not given any Rings, making this battle rather tough.

Boss guide[]

The battle with Mecha Sonic starts by standing still for a few seconds before starting to attack. At first, it follows a set number of attack patterns in the following order:

  • Mecha Sonic curls into a spiky metallic ball and charges across the room in a fashion similar to the Spin Dash. The player can Spin Jump over it.
  • Mecha Sonic charges across the room using its rocket boosters. However, upon reaching the end of the room, it turns around and charges in the other direction. The player can charge the Spin Dash for defense (while landing extra hits) or jump over it.
  • Mecha Sonic curls into a ball again and jumps across the room.
  • Similar to the third attack, Mecha Sonic fires eight small spikes around the arena in clock formation in mid-jump. While shot, each spike slightly expands. The player can avoid this attack by standing closely between Mecha Sonic's landing point and the downward-pointing spike.

The order of Mecha Sonic's attacks is as follows:

  1. Curls across the floor from the right.
  2. Charges from the left and back.
  3. Curling jump from the left.
  4. Curls across the floor from the right.
  5. Curls across the floor from the left.
  6. Curling jump from the right, with spikes.
  7. Charges from the left and back.
  8. Curling jump from the left.
  9. Curls across the floor from the right.
  10. Curls across the floor from the left.
  11. Curling jump from the right.
  12. Curls across the floor from the left.
  13. Charges from the right and back.
  14. Curls across the floor from the right.
  15. Curling jump from the left.
  16. Curling jump from the right with spikes.

As the battle goes on, Mecha Sonic's attack pattern becomes randomized. After the sixteenth attack pattern on the list, the list will repeat, but with all attack directions being reversed. Between attacks, Mecha Sonic will stand still for a few seconds, leaving it vulnerable. To land any hits on Mecha Sonic at that point, the player has to hit it on the front below its quill ridge with the Spin Jump or Spin Dash. Hitting Mecha Sonic on either its quills while it stands still or during its curling ball mode costs a life of the player. The battle is easier when playing as Amy, as her Jump Attack allows her to safely hit Mecha Sonic's quills.

After taking the eighth hit, Mecha Sonic will be destroyed, and the player can proceed to the Death Egg Robot.


  • While Death Egg Zone does not have any Rings in the original game, the alternative easy mode of the game in Sonic Jam adds a set of Rings at the beginning point of the Zone, making this battle more tolerable. Also in the easy mode, the player only has to hit Mecha Sonic three times to defeat it, as opposed to the usual eight.
    • Three Rings are also added at the start of the Zone in the Boss Rush mode of Sonic Origins.
  • A glitch may occur in this boss fight in which Mecha Sonic's defeat will glitch into a floating frozen flame, making the player stuck until the time runs out.


Name Artist(s) Length Music track
"STH2 Boss 〜Mega Drive version〜" Masato Nakamura 2:14

In other media[]

Books and comics[]

Sonic the Hedgehog (manga)[]

In the Sonic the Hedgehog serialized manga published by Shogakukan, Mecha Sonic was created by Dr. Eggman to serve as a guard onboard large space station Death Egg much like its game counterpart.

Archie Comics[]

Silver Sonic PSGW

Silver Sonic, from Sonic the Hedgehog #253.

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Mecha Sonic had several iterations. The first one was referred to as Silver Sonic v1.0. This robot was created by Dr. Robotnik, and engaged Sonic and Tails onboard the Death Egg. Despite its formidable strength though, it was defeated. An updated version of Silver Sonic named Silver Sonic v2.0, created by Dr. Eggman, was later sent to destroy Station Square, but was reprogrammed to protect the city instead, although it was eventually destroyed by Shadow the Hedgehog. After the Death Egg Mark 2 was launched, a third Silver Sonic named Silver Sonic v3.0 engaged Sonic and Sally onboard the Death Egg Mark 2. This model was destroyed over the course of Operation: Clean Sweep, although it would be rebuilt to challenge Team Fighters at one point.

After the Super Genesis Wave re-wrote reality, Mecha Sonic (still named "Silver Sonic") became nearly identical to its game counterpart, although its updated version would serve as a Badnik Horde Commander.

Sonic the Comic[]


Mecha Sonic, from Sonic the Comic #6.

In the Sonic the Comic series and its spin-offs published by Fleetway Editions, Mecha Sonic was a robot created by Dr. Ivo Robotnik when the doctor launched the Death Egg. Like its game counterpart, it encountered Sonic onboard the Death Egg, but was defeated, although it remained functional. Some time later, the hedgehog and Tails met Mecha Sonic once again upon returning to the Death Egg. However, Sonic defeated it for good by kicking off its head.



The 4″ Mecha Sonic action figure, by Jakks Pacific.

A 4″ scale articulated figure of Mecha Sonic with a bed of Spikes was released by Jakks Pacific in July 2020. The figure was later re-released in a 3-pack with Dr. Eggman and Sonic. In November 2023, a 2.5″ scale version of the figure was released. A repainted variant of the 4″ scale figure part of the Jakks Gold series also was also released.


This robot was not named in the English-language manuals accompanying Sonic the Hedgehog 2, but in the Japanese materials it was called "Mecha Sonic", much like other early Sonic robots.

Archie Comics used the name "Silver Sonic" for the version of the character in the Sonic Quest miniseries. Many fans adopted this name for the game character, particularly to differentiate it from the radically different design of Mecha Sonic Mk. II seen in Sonic & Knuckles.

"Mecha Sonic" was used as the official English-language name in the backstory for Sonic the Hedgehog 4: Episode I, released in the Story section of the official English website.[4] This robot's early concept art labeled it as "Meca Sonic", while the Japanese Sonic Jam Official Guide book refers to the robot as "Mechanical Sonic" alongside its accurate pronunciation in katakana: メカソニック (Meka Sonikku).[1]

In a pre-release video for Sonic Generations, it is briefly called both "Silver Sonic" and "Mecha Sonic",[3] by Aaron Webber, acknowledging the different names this robot has gone under in the fandom.



"Robo Sonic", from LEGO Dimensions.

  • Mecha Sonic makes a cameo appearance as a key chain along with several other Sonic characters in the Sega game Gale Racer, which is the Sega Saturn version of Rad Mobile released in 1994.
  • Prior to June 2010, a concept design of a 3.75″ Metal Sonic figure repainted to resemble Mecha Sonic was proposed by Jazwares, similar to the Metal Sonic 3.0 proposal. This was rejected by Sega.[12]
  • Mecha Sonic appears as a mid-boss in the Sonic the Hedgehog Level Pack for LEGO Dimensions. In this game, it is referred to as "Robo Sonic".
  • Concept art of this Mecha Sonic bears an "MS" insignia on its arm, likely referencing the original Mechagodzilla which has a similar "MG" insignia on its arms.




Sprites and models[]






See also[]


  1. 1.0 1.1 (in Japanese) ソニックジャム オフィシャルガイド. SoftBank. 2 October 1997. p. 52. ISBN 978-4797303377.
  2. Sonic the Hedgehog 1 & 2: Sega's Official Player's Guide. Compute. 1993. p. 145. ISBN 1-55958-335-5.
  3. 3.0 3.1 Sonic Generations - Death Egg Robot Boss Battle[HD] (GT). YouTube. TheMPlayers (23 October 2011). Retrieved on 4 July 2020.
  4. 4.0 4.1 4.2 Sonic the Hedgehog 4 :: Episode I > Story. Sega (9 December 2021). Archived from the original on 12 May 2013. Retrieved on 12 May 2013. "After the West Side Island is freed, Sonic and Tails board the Tornado, take to the skies, and assault the Death Egg itself. After destroying Mecha Sonic, Eggman flees and enters his final trump card - a huge robot modelled after Eggman himself!"
  5. (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. 100. ISBN 978-4091060907.
  6. Yasushi Yamaguchi on Twitter. Twitter (22 November 2022).
  7. Yasushi Yamaguchi (22 November 2022). Yasushi Yamaguchi on Twitter. Twitter.
  8. 8.0 8.1 8.2 8.3 Yasushi Yamaguchi on Twitter. Twitter (21 November 2022). Archived from the original on 21 November 2022.
  9. Yasushi Yamaguchi on Twitter. Twitter (22 November 2022).
  10. Yasushi Yamaguchi on Twitter. Twitter (22 November 2022).
  11. 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."
  12. Kellie (June 01, 2010). Joe Amaro from Jazwares Answers Your Questions. SEGA America Blog. Archived from the original on June 03, 2010. Retrieved on May 21, 2024.

Main article (Knuckles in Sonic 2) · Staff · Manuals · Glitches · Beta elements · Gallery · Pre-releases (Nick Arcade, Simon Wai) · Re-releases (2006, Dash!, Crash!, 2013, 3D, Sega Ages)