This question has several answers. It depends how you look at it. There are at least 5:
Red, immune to fire, and have slightly better attack than average
Yellow, Can be thrown high, carry bomb-rocks, (Pikmin 1) and are immune to elecrticity (Pikmin 2)
Blue, Immune to water. Yeah, that's it.
White, (Pikmin 2 only) Immune to Poison, and deals damage to enemies when eaten. Can also see underground to dig up extra treasure. Faster than average.
Purple, (Pikmin 2 only) Slow, but has high attack power and can stun enemies. Is as strong as 10 Pikmin!
Then there are some others:
Mushroomin,(Pikmin 1 only) Evil Pikmin infested by a Puffstool
Bulbmin (Pikmin 2 only) Underground only, and immune to Fire, Water, Electricity, and Poison!
Up to 100 Pikmin can be outside at a time. This includes wild Pikmin of colors you haven't discovered yet.
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.
No there is not a Pikmin that will give you more or additional Pikmin.
No. White Pikmin made their first appearance in Pikmin 2.
Although it's an unconfirmed pikmin, it will most likely to be nature
In Pikmin for the wii you need have a group of pikmin by you then press 1 and the pikmin will carry you back to their onion.
If you are talking about pikmin 1 then there is the infected pikmin.
approx. 13.3
5
Yes. The graphics in Pikmin 2 improved noticeably over those in the original Pikmin.
Yes. Blue Pikmin can serve as lifeguards and, when they are idle or thrown, toss drowning Pikmin onto dry land.
blue pikmin