Artwork from Metroid Prime.

Stone Toad is a species in the GameCube title Metroid Prime. As its name implies, it resembles a sort of Toad, and is literally almost always motion-less, like a stone. The only way to kill one is to get inside of it and bomb it. Since they have a tendency to block requried rooms, Samus Aran needs to kill them by going into Morph Ball mode and get engulfed. Once inside, she'll have to plant a bomb, which will cause the creature to explode.