Rainbow Bulborb

The Rainbow Bulborb is a colorful species of grub-dog that is rarely encountered and disappears in the blink of any eye when threatened. They appear only where there is rain. Ultra-bitter spray and ultra-spicy spray are invaluable for taking down a Rainbow Bulborb, but Purple Pikmin are also just as useful because they can stun the creature and inflict lots of damage to it. After its defeat, a Rainbow Bulborb's body can be brought to an Onion to gain thirty-five Pikmin seeds.

Olimar's notes

 * "The rainbow bulborb is mysterious. It only appears while there is rain and vanishes just as quickly as it appears. It hasn't been spotted very frequently, so specifics are unknown. Its powers, abilities, and traits all remain unknown..."

Louie's notes

 * "This has yet to be tasted."

=In other games=

In Pikmin: Rainbow World
The Rainbow Bulborb is the most common enemy encountered in Pikmin: Rainbow World. It is a more colorful, faster, and stronger relative of the Red Bulborb and has more attacks than it. It can not only eat Pikmin but also release a rainbow shockwave that kills most Pikmin it hits, except for Rainbow Pikmin, which instead lose a color.