Rainbow Islands: Towering Adventure! is a game developed by Taito for WiiWare. It is the third Rainbow Islands game in the Bubble Bobble series. The game was released in Japan on March 3, 2009, in the PAL regions on May 8, 2009 and in North America on June 15, 2009.
As a spin-off of the Bubble Bobble series, the game features slightly similar gameplay. The player will be able to play as either Bubby or Bobby, or both, who have to make their way to the top of several long, vertical stages with the aid of rainbows, which they can create.
Instead of health or a set number of lives, the game uses a time limit, which ends the game if it reaches zero. Getting hit by enemies will lose valuable seconds, but defeating enemies with rainbows will sprout forth gems that can replenish time. By defeating multiple enemies in a row, more valuable gems with bigger time bonuses are awarded. At certain points in the game, Dr Crescent will attack from below in one of his machines. Players can either try to defeat him, or evade him until the next checkpoint. By collecting seven colored gems, players can use a special attack against these mini-bosses.