Toad

Toad is largely seen as a pathetic punching bag whose entire existence is being humiliated and roasted by other characters, though X-Men Evolution's punk-rock version with the memorable rap theme elevated him to cult favorite status among fans of that series. His visual design is wildly inconsistent across adaptations, with no two artists drawing him the same way, and there's ongoing debate about whether his mutation actually causes his appearance or if he's just naturally unfortunate-looking. Despite his wasted potential in most comics, his role as Magneto's perpetually abused lackey has become iconic, even if it means he's rarely treated as a serious threat.