Rainbow Crystals are crystals found at the end of the Cave of Happiness, first appearing in MarioMario54321's Super Mario 64 Bloopers movie The Cosmic Crystals IV: Zythurvia. They were used to fuel the Rainbow Starship, which would be the ship that helps Mario and friends travel into other planets. It's possible that the planet Rainbowl is composed entirely of Rainbow Crystals. They could provide some power to Seizore, a Lanu Spirit.
Advertisement