[CupcakeDolly]

I think Boomerang falls under that category for cancelled cartoons. But think about how many shows have been cancelled over the years, you would need a separate channel for each genre, and even then there's only 24 hours in the day in which to air them. All of the really good cancelled shows get spots for re-runs on late night television anyway. (And all the time on SyFy, which seems to be having trouble coming up with new stuff. =P)