Mecha Knuckles

Mecha Knuckles is the roboticized version of Knuckles the Echidna. He assumed this form as a means of stopping Sonic the Hedgehog, whom Dr. Robotnik had Roboticized into Mecha Sonic for the purpose of destroying Knothole Village.

History
While Mecha Sonic was beating up Bunnie Rabbot, Tails recruited Knuckles to stop Mecha Sonic. Knuckles was beaten up as badly as Bunnie, forcing Princess Sally to carry out "Operation: Last Resort." They used a portable Roboticizer (the one that partially roboticized Bunnie), to mechanize Knuckles, and used a Neuro-Overrider that would allow Knuckles to retain his free will. As Mecha Knuckles, the two were evenly matched, until Mecha Sonic hit Mecha Knuckles with enough force to guarantee a collision course with Robotropolis, and a hefty supply of nuclear warheads. Knuckles used his magnetic claws to take Mecha Sonic down with him, and both survived- barely. Mecha Sonic was practically inoperative, but Mecha Knuckles was intact enough to knock out Robotnik (who had retreated to his nuke-proof shelter), and fly Mecha Sonic back to Knothole. Mecha Knuckles was deroboticed easily, and with minimal injury, as they had the roboticizer used to roboticize Knuckles. (SMM)

His only other appearance as Mecha Knuckles came unexpectedly when Knuckles, as Chaos Knuckles, attempted to restore the Floating Island by altering history. His third and last attempt, preventing the death of his ancestor Edmund, caused Knuckles to somehow become Mecha Knuckles again. when it looked like the change was irreversable, Knuckles, instinctively undid his blunder. As Edmund's brother Dimitri explained to Knuckles and Julie-Su, had that Dark Legionarre not assassinated Edmund, there would have been no need for the creation of the Guardians, leaving the Floating Island vulnerable to Robotnik's conquest. (StH #102)

Abilities
Like Knuckles, Mecha Knuckles has a great deal of strength, and is capable of flight. (As this was before Knuckles learned of the Chaos Force, it is unknown as to how his link to Power Chaos was affected.) His greatest feature, however, is his magnetic "Knucklaws." They are not only able to completely block two full laser blasts, but using the claws in that manner drains the opponent's batteries. Additionally, they can generate a strong magnetic field that even Mecha Sonic could not escape from. To add insult to injury, since one of Robotnik's older roboticizer units was used, that meant significantly fewer "foreign inferior parts" were used, which Mecha Knuckles used as part of the reason as to why he had less damage from the nuclear blast than Mecha Sonic.