Whilst cleaning up Dr. Robotnik's lab, Coconuts accidentally knocks a bunch of chemicals into a bathtub. When Robotnik enters the lab, he slips on a mop and lands head first into the tub. The chemical formula ends up turning him into Super Robotnik, in a manner parodying most superheroes like Superman. He gains abilities including flight, super strength, X-ray vision, freeze breath, a super-computing brain, a telescopic eye, and heat vision. With these powers he humiliates Sonic and kidnaps Mobius' World Leaders. He challenges Sonic to a gladiator contest where he, if he loses, must leave Mobius forever.
However, Robotnik soon learns that he is vulnerable in his butt as it is not soaked in the formula. Coconuts makes him a Rump Protector to protect his sensitive area. When Sonic and Tails discover this, they get Professor Von Schlemmer to invent a powder which penetrates him through his weak spot and makes him weak. Whilst initially ineffective, Robotnik loses his super powers shortly before the gladiator contest ends, allowing Sonic to win it.