Larson

Larson is a Bandit who stole Goomther's credit card in Paper Mario: The Thousand-Year Door. After he stole Goomther's credit card he wanted to keep stealing however after Goomther told the Trouble Center, Larson hid in the hidden alley of Rogueport where Darkly is.

If the player takes Goomther's trouble, Mario and his partners have to chase Larson around Rogueport until they get the credit card back.

Trivia

 * While "Larson" is indeed a name, this Larson's name also happens to be a pun on "larceny", an alternate term for "theft".