Kamen Rider Poseidon

Kamen Rider Poseidon is The Movie Exclusive Rider in Movie War MEGAMAX, Just like OOO, it also utilizes core medals and had a somewhat simpler looking Driver. Unlike the way OOO transforms with his core medals, Poseidon had his core medals put in a triangular position on the driver. The cores utilized by Poseidon are Shark, Whale and Jellyfish.