[[Image:Ultimate_Chimera.jpg|200px|thumb|right|The '''Ultimate Chimera''' with [[Lucas]].]]
The '''Ultimate Chimera''' is a character in the game ''Mother 3'', and a gimmick in ''[[Super Smash Bros. Brawl]]''. It only appears on the [[New Pork City]] stage of the game, where it randomly appears anywhere across the stage, and it starts attacking the players. The creature is invincible, and any attempts at damaging it or knocking it away fails. If the Ultimate Chimera manages to attack the players on the stage, it instantly KOs the players (unless an obstacle stops them), sending them flying across the stage. Each bite deals 200% damage.
In the event that the Ultimate Chimera ends up on a breakable platform, the player can use an attack to destroy the platform causing the Ultimate Chimera to fall and respawn on the field in another area.