Pikashu

Pikashu (ピカシュー) is a electrical robot enemy that emerges from the Brain Crusher in Mega Man V, as well as Alabell. They can control the gravity of the room, making Mega Man levitate to hit the spikes in the ceiling.

Trivia

 * It is very obvious that this enemy isn't Pikachu from Pokémon, specially because Mega Man V was released before the first Pokémon game. Their names are both derived from "pikapika", a Japanese onomatopoeia for electric sparkling.