Captain Boo
- “For crying out loud...I think we scraped the bottom of the captain barrel.”
- —Captain Boo, Mario & Luigi: Superstar Saga + Bowser's Minions
Captain Boo is one of the main protagonists of the Minion Quest: The Search for Bowser story mode from Mario & Luigi: Superstar Saga + Bowser's Minions. The mode takes place parallel to the main story of Superstar Saga, after the Koopa Cruiser crashes into Stardust Fields. He first encounters Captain Goomba and Captain Shy Guy in Chucklehuck Woods when he is busy working for a brainwashed Iggy Koopa in conquering Chucklehuck Woods, and he tries to toy with them, but they catch his act and reveal him. The two captains ask him to come with them and try to recruit him, but he says he's too busy helping Iggy. They then proceed to give him the full rundown on what happened to Iggy, but he doesn't understand any part of what they're saying. He complains that he wants to go home, and that he feels really upset, but that he doesn't want to disobey Iggy. Captain Shy Guy responds by saying what he's doing is disobeying Bowser, and with this, the Boo becomes a captain of the squad and fights alongside Captain Goomba and Captain Shy Guy as they fight to rescue and reunite with Bowser.
