Torpedo Base

Skull Boxes are enemies that first appeared in Soda Lake in Super Mario World. They fire Torpedo Teds at Mario. Much like Bill Blasters, the Skull Box cannot be destroyed.This makes the level tricky to traverse. They return, still invincible, in Super Princess Peach, and looked a bit more like Bill Blasters in Super Mario Galaxy, where they actually can be destroyed by leading a Torpedo Ted right back at them.