Mr. Γ or Mr. WL is Waluigi's alter ego, he is very similar to Mr. L.
Debut as a kart racer!
Waluigi gets brainwashed to become Mr. Γ for the second boss in Paper Wario.
He appears in the second and third games as a character appearing when Waluigi comes in contact with a Wacky Orb. Like the other Mr. Forms, it only lasts for a limited time, but he is invinsible, very much like the stars of other Mario games.