A psychotic mechanical genius, Iggy is almost certainly the smartest of the Koopalings, but his extremely childish and playful personality may suggest otherwise. Just like all his siblings, he wields a magic wand capable of virtually whatever he wants, but he usually uses it to dispatch any of Mario's posse who come his way. He is a yellow-scaled koopaling with a large upright tuft of bright green hair atop his head and a green, spiked shell on his back.