North American release. Game developed in Japan. See the original Famicom version for more information: "Bubble Bobble 2 [Model TFC-BB]".
Description from the back cover:
A new breed of heroes!
Cubby and Rubby, descendants of the famous Bubby, must battle the Skull Brothers and their army of fiends to rescue a friend in danger. Fortunately, our dinosaur heroes can blow bubbles that will destroy their foes. They will rain fire, floods and tornado.