Fireball (Donkey Kong)

Trouble Bugs are fireballs that appear in the games Donkey Kong and Super Smash Bros. Brawl, on the 75m stage. In Donkey Kong, when DK throws an initial barrel downwards, it will land in the oil barrel at the bottom of the stage. The wooden barrel will catch on fire, and become a Trouble Bug. Trouble bugs will then move around the bottom row, until it reaches a ladder, in which it will climb it up.