Mr. L

From Paper Mario Wiki

Mr. L is Luigi, brainwashed by Nastasia from Super Paper Mario. He fights for Count Bleck. He was hired to to the Dark Prognosticus saying that The Man In Green would confront The Man In Red, Mario. He fights just like Luigi normally would from the start, using Spring Jump and drinking Shroom Shakes. He then reveals his invention, Brobot which he controls. He upgrades it after his defeat to become Brobot L-Type which has arms and legs. After his second defeat, Dimentio kills him and thus releases the brainwashing. Mario finds him in the Underwhere and he joins you. Mr. L is also refered to when Dimentio controls him with a floro seed and turns him into Super Dimentio.