Super Smash Bros. Brawl/Bosses

Ancient Minister
He is the servant of the main villain of the game but he turns to the good side as R.O.B.

Petey Piranha
Petey shows up within The Subspace Emissary. He carries two cages, one in each hand that contain Princess Zelda and Princess Peach. You only get to save one.

Rayquaza
Rayquaza appears in The Subspace Emissary's jungle section, when Diddy Kong finds Fox's ship crashed near a lake.

Ridley
The leader of the space pirates in the Metroid series, Ridley is a large, flying pterodactyl-like creature that can breath fire.

Tabuu
Tabuu is the main villain of the game. He has a blue-fluorescent color and a real human shape.