Rainbow Islands - The Story of Bubble Bobble 2 © 1991 Taito Corp.
North American release. Game developed in Japan. See the original Famicom version for more information; "Rainbow Islands - The Story of Bubble Bobble 2 [Model DTF-RL]
Description from the back cover:
Bubby and Bobby travel to Rainbow Islands in search of hidden treasure. Instead, they find only trouble. Seven worlds, plus a special bonus world. 32 action-packed rainbow-jumping levels of play. Play a demo round to get ready for the real thing. Defeat seven unsavory enemies to earn seven colored diamonds.