Gamer boo debuts is from The Mario Channel: MARIOBUSTERS on the ARE BOOS SCAREDY-CATS? Skit with another boo,he is scared by a game with Mario in it.
He reappears as cameo in The Mario Channel: MARIO’S CHALLENGE when all the contestants line up to go in mario castle
He make another appeared was in SMG4: Stupid Luigi’s Mansion,when he almost got sucked by Luigi,but slap him in anger
His latest appearance was in SMG4: The Movie Audition as a cameo in the line.