Spiky Tromp

A Spiky Tromp is a enemy from the Wii game Super Paper Mario. In some levels, hundreds of them appear at one time. It is a smaller version of a Spiny Tromp.

Tattles
"It's a Spiky Tromp. For Some reason, it enjoys rolling left and right all day...  You can't beat it...  You can only avoid it...  It will move until it hits a wall, then will come right back at you..."