New Rainbow Island - Hurdy Gurdy Daibouken!! (Japan) - PSP - Platformer

Bub and Bob, the two main characters in the series, are against an evil recording company that seeks to pollute the Rainbow Islands'' atmosphere by creating constant musical noise, therefore wilting the flora and mutating the fauna. In this game, Bub and Bob use a hurdy-gurdy (an old European musical instrument) as a weapon to create the rainbows.