Doomsday Apparatus

The Doomsday Apparatus is a weight and treasure in Pikmin 2. It is found in the Wistful Wild and may be the first treasure you see in this area. It is possibly the hardest treasure to get since it requires 100 Purple Pikmin. Those Pikmin would best be gotten at the Subterranean Complex on Sublevel 8 because it has 3 Violet Candypop Buds and they never disappear or the Submerged Castle on Sublevel 5, the last Sublevel which has 2 Violet Candypop Buds and they never disappear. This is the most valuable treasure in the game giving you 3,000 Pokos.

Olimar's Journal
''Perplexing mysteries are often solved in unexpected ways. When I was studying this item earlier today, I was astounded at its unbelievable bulk. It was so heavy! I would have never been able to move it without my burly purple Pikmin. Later analysis indicated this thing is in fact some kind of heavy artillery.''

Sales Pitch
"An apocalyptic weapon made of super-heavy, gravity-compressed materials of unknown origin. The fact that its great weight makes it uncontrollable is, at times, a mild detriment.''