There are two main Mushroom Pikmin glitches:
You have to leave Pikmin idle by a Puffstool and call them at the exact moment they are hit by the Puffstool's spores. This requires perfect timing. Be careful, as Mushroom Pikmin will attack any other kinds of Pikmin.
ONLY TWO.It's in mushroom gorge.
The easiest way to get white and purple Pikmin is to go into easy caves, find the Candypop Buds and transform Pikmin, then get out. Keep in mind that Candypop Buds do not reappear in the same day after leaving a cavern. Emergence Cave in the Valley of Repose is best for purple Pikmin, and the White Flower Garden in the Awakening Wood is best for whites. Relatively easy caverns that can be used to get white and purple Pikmin are the Snagret Hole in the Valley of Repose and the Citadel of Spiders in the Perplexing Pool.
Mushroom Pikmin are Pikmin that have been transformed by the spores of a creature called a Puffstool. Affected Pikmin turn purple and try to attack Olimar and normal Pikmin. This effect wears off after a while.
No there is not a Pikmin that will give you more or additional Pikmin.
The following are known glitches in Pikmin 2:If you use the napsack to sleep just as your character is hit by a falling boulder, you will jump extremely high.Sometimes, Pikmin or captains can move through the corners of bridges.Drowning Pikmin under a bridge can still be warped to and saved by blue Pikmin on top of the bridge.If one of your captains is captured by a Bumbling Snitchbug and you wiggle the Control Stick and press A when it throws him into the ground, the captain may fall completely through the ground and respawn at the ship.Captains can become stuck inside the hole that appears when The Key is recovered in a Challenge mode level, if they are standing in the spot where it appears.Strange things happen when captains are carried over the edges of cave sublevels.If you call back Pikmin while they are drinking nectar, they will sometimes get flowers without making the nectar disappear.Sometimes, when a Waterwraith's head comes in contact with an object, it can begin sliding around without stopping.Bosses that are in particular arenas can occasionally be lured out of bounds by Pikmin or captains. If they fall off of the edge of a stage, it will crash the game.
No. White Pikmin made their first appearance in Pikmin 2.
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.
Although it's an unconfirmed pikmin, it will most likely to be nature
In the first game, the yellow Onion is in the second area, the Forest of Hope. Take enough Red Pikmin to defeat the Bulborb north of where you start out. Then, knock down the wall and kill the Bulborbs, dismiss the red Pikmin, and go north. You should see a darkish yellow colored Onion in the ground. Approach it, and it will turn bright yellow and rise out of the ground, and produce a single Yellow Pikmin sprout which you can then multiply. In the second game, the yellow Onion is visible immediately upon entering the third area, the Perplexing Pool, along with a few wild Yellow Pikmin. You will need Red and White Pikmin to reach them. First, head around the side of the stump where you see the Onion, where you'll find a scale puzzle. Once you get passed that, you'll see that the only way to where the Onion is has a wall raised with poison generators beneath it, and a Fiery Bulblax blocking the way to that wall. Use your Red Pikmin to kill it, and then use your White Pikmin to break down the gate and disable the poison generators. After that, all you'll need to do is whistle the wild Yellows. In the third game, Brittany finds the yellow Onion immediately upon entering the third area, the Distant Tundra. She'll wind up in a cave where she'll find two Yellow Pikmin trying to light a light bulb, and three Pikmin sprouts in the ground. With all five, the light bulb will light, and the Onion will bloom and rise from the ground. Within the cave, there are enough pellets to generate twenty more Yellow Pikmin, for a maximum total of 25; you will need at least twenty to open the way out of the cave.
If you are talking about pikmin 1 then there is the infected pikmin.
Yes. The graphics in Pikmin 2 improved noticeably over those in the original Pikmin.