I once saw this movie, late night on sci-fi channel in the mid 90's I think..
There's was some sort of rebellious company of four or five differnet characters, one of them was a fairy,
And they fought against an army of dumb and clumsy soldiers with gasmasks, looked like neo-nazis.
It somehow had the same humorous touch as fritz the cat. Does anybody recognize it?!

I've been dying to find out the name of it!! But I guess it must be pretty hard to find. Must have been some
Sort of underground-animated movie.

The film you describe sounds a little like the 1977 film Wizards to me. Here's the IMDB link Wizards (1977) (http://www.imdb.com/title/tt0076929/)