Alatreon from Monster Hunter - Tri (With a bad group)
Xehanort with Riku from Kingdom Hearts-DDD
Seymour Flux from FFX.
Shao Kahn. I am not good at fighting games at all, and dat shoulder charge...
SFII: Super Turbo - Hidden Boss Akuma. Nuff said.
Hands down, last boss of Mushihimesama Futari: