Rainbow Islands (Europe) (GBC)

In Rainbow Islands, players control the main character, Bubby (or Bobby), one of the dragons from the well-known Bubble Bobble game. The primary objective of the game is to ascend to the top of each vertically scrolling stage, defeating enemies and collecting items. The unique selling point of Rainbow Islands is the ability to create rainbows.

Bubby can shoot out rainbows with multiple uses. Rainbows are not only weapons to defeat enemies but can also be used as platforms to climb higher. When enemies are hit by a rainbow, they transform into collectible items, usually coins or or various gems.

Each stage in Rainbow Islands is a distinct island with a unique theme and unique enemies. Players must move quickly upwards as there is a time limit or a rising threat (like water or lava) from below, forcing the character to continuously ascend. Collecting all seven hidden diamonds on each island is key to unlocking the game's true ending.

Additionally, various power-ups are scattered throughout the stages, helping Bubby increase speed, enhance rainbow power, or provide other special abilities. The Game Boy Color version of Rainbow Islands retains the engaging core gameplay of the original arcade version, offering a colorful and challenging platformer experience on the handheld console.