Why have they stopped making new episodes? I understand that It takes long, but the last new episode was in like 2000. Does anyone know anything about this?

Well Nick definitley canceled it. Im guessing because it was an old show and most Nick shows dont go longer then 4 or 5 years (Rugrats is an exception, which was on for like 10 years). Nick seems to be getting rid of its older shows anyway, the only ones left are Spongebob, Fairly Oddparents, and Jimmy Neutron, and All That (which is ending soon). Guess they have to make room for the extra crappy shows that only appeal to 5 year old boys.