Olimarnite Shell

The Olimarnite Shell is a treasure in Pikmin 2 that is actually an ammonite fossil. It is found on the 3rd sublevel of the Bulblax Kingdom. It is completely buried in the ground, so White Pikmin are needed to dig it up. It is the 47th treasure on the List of Pikmin 2 treasures.

Captain Olimar's Journal
"This fossil was dug up deep underneath the Awakening Wood. Given its shape and morphology, I suspect that it is some kind of prehistoric sea creature. If so, it's feasible to say that the whole region was once situated on the ocean floor."

Sales Pitch
"A fossil of an ancient sea inhabitant. It is most desirable despite its unappealing name. (Captain Olimar named it without consulting anyone. He could have at least named it after his faithful spaceship...)"

Trivia

 * It was named after Captain Olimar