The '90s were a great decade for cartoons, as not only were animated shows on TV Saturday morning, but kids could also catch them on Nickelodeon, Cartoon Network, and more. It was also the decade when adult animation really started to take off, with The Simpsons, Family Guy, South Park, and more. However, all good things must come to an end — even cartoons that never age up their characters — and some of these shows had pretty strange reasons for going off the air. From the Nickelodeon show that got Disney-fied to the animated Roseanne show that just didn't work, let's take a look at why these '90s cartoons really got canceled.