This Article Contains information directly from the Pikmin Games. This article is based off of an Enemy/Treasure/Area/Cave/Pikmin/Character from the Pikmin series of Games.
The Colossal Fossil appears to be the skull of a primate. It is found on Sublevel 6 of the Bulblax Kingdom, partially buried in an alcove. When Pikmin dig it up, a bomb-rock is likely to fall from above.