Pikmin is one of the most innovative and fun games I've played in a while, and the atmospheric ambience of the soundtrack fits in perfectly with the level. From dark, sandy areas with flame spouts to immense challenges, the immersive world of Pikmin would be nothing without a soundtrack which matches what you see perfectly.
Composed by Koji Kondo, the same man who composed the Legend of Zelda and Mario themes, the soundtrack is one of Pikmin's best aspect, and a must-have for any fan.