GameBoy: Pop'n TwinBeeThe Twin Bees, who were living peacefully in Donburi Island, receive a challenge from an unknown individual calling himself Dr. Nikki. "How dare you destroy my creation King Spice, as well as Gattlantis and Poco Poco! This time I'll be your opponent. I'll be waiting for you at Puka Puka Island." Dr Nikki was none other than Dr. Cinnamon's childhood rival. Whereas Cinnamon decided to use his intellect for the greater good, Nikki became a mad scientist.