Frankie Muniz played Chester McBadbat from 2001 to 2003.
Some big fat lady.
March 30, 2001 ---- September 1998 on 'Oh yeah!' The answer above is When it was it's own show. i think it was the Best before XDD
Cosmo and Wanda are fictitious characters, of course. But fairies are said to exist, maybe not the kind who grant wishes on Earth.
Including one coming up on Jan 2, 2010 there are 109.