Skull Bash is Pikachu's Side Special Move in Super Smash Bros. Global Apocalypse. It works similarly to SSBB's. Pikachu charges up, then moves forward, towards the direction he's facing, releasing a small explosion, and damaging anybody he hits in the process. It can be charged up to 3–4 seconds, and it's range and damage increases depending on how much it is charged.
Game Boy - Pokémon Red/Blue (1998)