A Pooka.

Pookas are enemies from Dig Dug. It also appears as a recurring character in Pac-Man World, and appears as an enemy in Pac-Man World 2. In Super Smash Bros. for Nintendo 3DS, they appear as common enemies in Smash Run. They also appear in Pac-Man's Up Taunt.

Trophy Description

These little monsters from the Dig Dug series like to jump around and throw themselves into people. They'll burrow through the ground to protect themselves from attacks as they approach. If you do manage to hit one, it'll puff up, growing with each attack until it explodes. Try hitting enemies with its explosion