Goose

Goose is a member of the Robbo Gang and is in charge of the Trouble Center in Paper Mario: The Thousand-Year Door. Mario can find him by turning paper-thin (hold the R button) and moving between Bobbery's house and the Trouble Center. The wall will look normal but Flurrie can blow the wall away to reveal a door. Goose might just give Mario a little something to keep the secret quiet.