After Samus defeats Meta Ridley on Norian, he accepts the corruption of Phazon to become the much more powerful Omega Ridley. Taken over by the Phazon, he guards a Leviathan seed on the Pirate Homeworld. The only weak points in his armor-like skin are his mouth, which can only be attacked as he uses it to attack you, and his chest, which must be ripped open with the Grapple Lasso.