Spike Tops are enemies from the Mario universe. Spike Tops are Buzzy Beetles with shells that are red and have a single spike projecting out of the top (hence the name), making them impossible to jump on, however, it's posssible to attack them, Spike Tops can crawl around the walls and ceilings of caves.
Spike Tops appear as common enemies in Smash Run, with his New Super Mario Bros. design, they seem to do the same thing as they did in the Mario games. If a player touches the Spike Top's spike, they will be instantly Meteor Smashed regardless of how much damage they have taken.
These turtles come from the Super Mario series and have one big spike on their backs. Their eyes glow from beneath the edge of their shells, watching you as they approach. In Smash Run, they crawl along walls, floors, and the ceiling. They aren't bothered by projectiles, so you'll have to find other ways to defeat them.