From the Super Mario Wiki
Mario & Sonic series
Mario and Sonic at the Olympic Games
Mario and Sonic at the Winter Olympic Games
He reappears as a referee in Mario & Sonic at the Olympic Winter Games, and drops the puck in the Ice Hockey event during the Face Off. He also appears in the Adventure Tour of the DS Version. In it, the other members of Team Chaotix left him behind in Cubyrinth while they were traveling. He will not open the gates he is in front of unless the player finds Vector and brings him to Charmy. Charmy will then argue with Vector and he will start a quiz. If the player completes the quiz, Charmy will cheer and open the gates. If the player talks to him enough times, he will tell the player the number of whitestones on Dream Island.
Mario and Sonic at the London 2012 Olympic Games
Charmy Bee reprises his role as a referee in Mario and Sonic at the London 2012 Olympic Games.
Super Smash Bros. Brawl