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Sonic Wiki Zone
Sonic Wiki Zone

Don't let that off-color facade fool you - that isn't Knuckles! Mecha Knuckles restricts his attacks to Knuckles' repertoire while disguised, but unleashes a missile barrage once his cover is blown.

— Description, Sonic the Hedgehog Encyclo-speed-ia

Mecha Knuckles[2] (メカ ナックルズ[3] Meka Nakkuruzu?), also known as Mechanical Knuckles,[3] is a character that appears in the Sonic the Hedgehog series. He is a robotic doppelganger of Knuckles the Echidna created by Dr. Eggman during an attempt to establish his Eggman Empire.


Red mecha knux
Mecha knux

In his first form, Mecha Knuckles looks near identical to the real Knuckles, except that his fur is magenta instead of red, his eyes are blue instead of purple, and he wears yellow gloves instead of white.

In his second form, while Mecha Knuckles still maintains the basic body shape of the real Knuckles, he sheds his fur skin to reveal a metallic gray color scheme covering most of what would have been Knuckles' organic body. He also has a wider and mechanical-looking mouth and visible robotic joints, and his shoes become predominantly gray and yellow. His eyes are also revealed to be pupilless red optics made up of hexagonal pieces.

In his appearance in the Sonic the Hedgehog comic series by IDW Publishing, Mecha Knuckles sports a mostly gray body, with noticeable modifications at patches of rust. Being initially modeled after Knuckles the Echidna, Mecha Knuckles sports a similarly shaped head to his, complete with robotic dreadlocks, some of which are damaged. His head also features a yellow hinged muzzle, two entirely red eyes, and a painted black "nose". Mecha Knuckles' torso sports a mechanical tail, and what appears to be a damaged engine inside it, while his legs are rusted, and feature noticeable joints. At the end of Mecha Knuckles' legs two mismatched "shoes", the leftmost of which resembles a damaged version of Knuckles', while the rightmost is of a tread of a Grounder. Mecha Knuckles' arms are composed of the tails of a Skorp, with the left hand featuring the spiked ball from the Skorp's tail, while the rightmost of which leads to a yellow hand. For attire, Mecha Knuckles wears a Shovel Claw on his right hand, and a frayed brown hat with a yellow and red star pattern on his head. Following his fight against Mecha Sonic Mark II, he gains a large gash in his back with numerous loose wires hanging out.



Sonic Advance[]

In Sonic Advance, Dr. Eggman used Mecha Knuckles to stop Sonic the Hedgehog, Miles "Tails" Prower, Knuckles the Echidna and Amy Rose when they arrived at Angel Island Zone. The heroes appeared slightly stunned seeing the Knuckles doppelganger robot but nonetheless fought against him. Even with his surprising and more powerful second form unveiled at the edge of defeat, Mecha Knuckles stood no chance against the heroes, causing him to malfunction from damage and explode into pieces, forcing Dr. Eggman, who was observing the battle, to flee.


Mecha Knuckles is a silent and deadly automaton, originally programmed by Dr. Eggman to defend the Master Emerald shrine from intruders.

In the Sonic the Hedgehog comic series by IDW Publishing, Mecha Knuckles retains this characterization. However, unlike the inhabitants of Scrapnik Island, he was unable to gain a conscience or independence from his original programming, needing E-117 Sigma to reprogram him so instead he would defend the abandoned Egg Carrier.

Like his organic counterpart, Mecha Knuckles is serious and no-nonsense when it comes to his duties as a guardian, to the point where he will attack anything he identifies as an intruder on Eggman's former battleship.

Powers and abilities[]

As a robotic doppelganger of Knuckles, Mecha Knuckles retains most of the abilities his organic counterpart possesses, including the ability to Spin Jump, glide and Spin Dash. However, in his second form, he gains the ability to fire accelerating homing missiles out of his mouth at high speeds at his enemies.


Mecha Knuckles is the boss of Angel Island Zone in Sonic Advance, and the fifth boss overall. He is battled with Sonic, Tails, Knuckles or Amy at the end of Angel Island Zone Act 2.

Boss guide[]

At first, Mecha Knuckles will attack by either a Spin Jump followed by glide towards the player, a Spin Dash, or a Punch Attack at close range. It is best that the playable character avoids Mecha Knuckles when he uses the Spin Dash and avoids attacking him from the front when he glides, or they take damage. The robot will also block attacks such as the Punch Attack, the Hammer Attack, Tail Swipe, etc., but will be vulnerable to these attacks while revving his Spin Dash. When Mecha Knuckles glides, the player can also hit him with a Spin Jump from anywhere besides the front or a Hammer Attack to damage him. Also, the player can still attack the robot while he is falling after gliding or standing still.

Once he has been hit four times on Normal mode, or three on Easy mode, Mecha Knuckles will unveil his second form. In this form, Mecha Knuckles still uses the same moves as before, but will become faster and more aggressive. In addition, he now gains a new attack which he fires a few homing missiles at the player in succession which can be difficult to dodge as they must jump at a specific moment to avoid each of them. Mecha Knuckles must be hit another four times on Normal mode, or three times on Easy mode, to defeat him and end the boss fight. The player must then wait for the capsule to land before pressing it to finish the Act.

In other media[]

Books and comics[]

IDW Publishing[]

Mecha Knuckles appears in the IDW Sonic the Hedgehog comics, where it is said that after his defeat, he ended up on Scrapnik Island, abandoned and forgotten by Eggman. He was so embodied by his programming that E-117 Sigma was unable to remove it. Sigma eventually diverted his protective instincts so that he guards the abandoned Egg Carrier instead.[1]

Shortly after Sonic and Tails crash landed the Tornado on Scrapnik Island, Mecha Knuckles would begin stalking them as E-117 Sigma and Mecha Sonic gave them a tour. He would also watch from a distance and follow Sonic, Sigma and Mecha Sonic as they returned to the Death Egg to get to the abandoned Egg Carrier.[4]

MechaKnux vs

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

Mecha Knuckles would later ambush Sonic and Mecha Sonic while they were searching for a part to repair the Tornado, registering Sonic as an intruder. Sigma would explain that he was unable to fully remove Mecha Knuckles's original directive of protecting the Altar of Emerald from his programming, so he changed the target of his protective instincts to the abandoned Egg Carrier. Sigma would try to tell Mecha Knuckles that Sonic was their friend, which seemed to work until Mecha Knuckles's programming retook control, causing Mecha Knuckles to attack Sigma.[1]

Mecha Knuckles and Mecha Sonic would then begin fighting, with Mecha Knuckles eventually gaining the upper hand and as Mecha Sonic would begin having hallucinations of his past. After having seemingly defeated Mecha Sonic, Mecha Knuckles approaches Sonic to attack him next, only for Mecha Sonic to reawaken from his hallucination and grab Mecha Knuckles before destroying him with a deadly Spin Attack from behind, which even Sonic believed to be overkill.[1]

Mecha Knuckles is later discovered by Sigma after the latter reactivates, and is carried by him across the Death Egg before encountering Tails, Benedict, Florentine and Rancheros. Mecha Knuckles is then kidnapped and sent to the Death Egg's garbage disposal along with Sigma when they're attacked by a rogue Mecha Sonic. Tails and Sigma manage to repair Mecha Knuckles, and he helps them and the other Scrapniks in rescuing Sonic and Mecha Sonic from the Death Egg's incinerator. He is seen standing off to the side with his arms cross as the Scrapniks celebrate, and again after Tails had removed Dr. Eggman's original programing from him and Mecha Sonic.[5]


E-117 Sigma[]

In the Sonic the Hedgehog comic series by IDW Publishing, Mecha Knuckles was repaired and reactivated by E-117 Sigma upon arriving at Scrapnik island, but Sigma was unable to fully remove his directive to defend the Altar of Emerald, and instead reprogrammed him to defend the abandoned Egg Carrier instead. Despite his programming, Mecha Knuckles appears to view Sigma as a friend or ally, as he initially listens and stops fighting when Sigma tells him that Sonic wasn't an enemy, and later helps him and Tails rescue Sonic and Mecha Sonic.





  • The first phase of this boss fight is similar to the battle against Knuckles in Sonic & Knuckles.
  • Mecha Knuckles may be a reference to the character Mechagodzilla, as his boss fight heavily mirrors the plot of the 1974 film Godzilla vs. Mechagodzilla, in which Mechagodzilla is disguised as the original in order to cause havoc, until his disguise is destroyed by the original. The two also share a few design elements, such as a grey color scheme and compound eyes.
  • The hat worn by Mecha Knuckles in the IDW Publishing comic series is based upon the hat originally worn by Knuckles the Echidna in Sonic the Hedgehog: The Movie.
  • On page 64 of the Victory Guide strategy guide book of Sonic Advance, Mecha Knuckles is misspelled as "Mechanical Knackles'".[3]


IDW Publishing[]

Concept artwork[]


  1. 1.0 1.1 1.2 1.3 Sonic the Hedgehog: Scrapnik Island #2, "Scrapnik Island, Part 2"
  2. 2.0 2.1 Flynn, Ian; Sega (8 December 2021). Sonic the Hedgehog Encyclo-speed-ia. Dark Horse Books. p. 121. ISBN 978-1506719276. "Boss: Mecha Knuckles. Knock the paint off this imposter, and he'll unleash his full power."
  3. 3.0 3.1 3.2 (in Japanese) ソニックアドバンス必勝パーフェクトガイド. Aspect. 2 August 2002. p. 64. ISBN 978-4757209145.
  4. Sonic the Hedgehog: Scrapnik Island #1, "Scrapnik Island, Part 1"
  5. Sonic the Hedgehog: Scrapnik Island #4, "Scrapnik Island, Part 4"

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