Amp

Amp appeared in 1996 video game called Super Mario 64. Amps are small, electrified metal balls that have appeared as enemies throughout the Mario franchise. Their name stems from "ampere" (often shortened to "amp"), the standard unit of measurement for the flow of electrical currents. Amps debuted in Super Mario 64 and have made occasional appearances since, especially in the Mario Party series and New Super Mario Bros. games.

Amps originally sported white "cross-popping" veins, joyful red eyes, and rounded white lips with a pure red mouth. Since Super Mario 64 DS, their usual appearance has been changed a bit. They now have more jagged yellow eyes and a larger, jagged mouth. They now have a red tongue and dark red interior being visible inside the mouth. They are also now black rather than grayish and sport no angry veins.