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Sonic News Network
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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[1] (メカ ナックルズ[2] Meka Nakkuruzu?), also known as Mechanical Knuckles,[2] 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.gif
Mecha knux.gif

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 pupil-less red optics made up of hexagonal pieces.


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.

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 will fire homing missiles at the player which can be difficult to dodge as they must jump at a specific moment to avoid 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.


  • 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.


  1. 1.0 1.1 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."
  2. 2.0 2.1 (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.

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