Mushroom Pikmin, in my opinion, are the best. Why? Because they are ze ZOMBEHZ! And instead of a flower/leaf/bud they have mushroom which is really cool. The shade of purple on their skin suits them really well too. I also think we should bring back the Puffstool !
Bulborb Picture Gallery: (Which I may or may not have copied from the bottom of the FAQ page)
My signature was made by Volatile Dweevil. Every single ounce of credit goes to him.