The Subterranean Complex has nine sublevels. The boss, a Man-at-Legs, is on the final sublevel, and there are Candypop Buds to create more Pikmin on sublevels four and eight.
Up to 100 Pikmin can be outside at a time. This includes wild Pikmin of colors you haven't discovered yet.
There are 2 energy sublevels in the second principal.
There are two sublevels in the 2nd principal energy level. They are the 2s and 2p sublevels.
Just keep defeating enemies and bringing them and pellets into the Onions, and you will eventually get 900 Pikmin. There is no practical reason for having this many Pikmin, though.
Five.
A subterranean stem is another word for an underground stem. They exist under the soil surface. There are many types of subterranean stems such as bulbs, corm, and stolon.
2
3
2
approx. 13.3
5
When you are playing as Olimar, use his special (Button B) to pluck pikmin. Remember that you must be standing on something to pluck pikmin and that there is a limit to how many you can control.