Ren & Stimpy - these guys were amazing, totally off the wall and really, really, weird. Became a worldwide phenominan and made Nickelodeon billions, setting them up as the kiddie-swallowing behmoth it is today. Then the Nicklodeon CEOs took control after series 2, and it became pretty unfunny by the end of series 3. Died on its arse after series 5. Without them modern "greats" like Spongebob and Fairy God Parents simply would not be allowed to exsist. A crime against hummanity and the very fabric of the universe itself.