Beetlejuice! Beetlejuice! Beetlejuice!
You can't talk great Saturday morning cartoons without summoning the magical, shape-shifting, prank-pulling "ghost with the most" from this show, which was based very loosely on Tim Burton's 1988 movie Beetlejuice.
Joined by his best friend, Lydia Deetz, an eccentric young goth girl outcast, the trickster scourge of Neitherworld goes on adventures and generally screws with people (making him every kid's obvious choice for a role model). With sight gags for the youth and intelligent writing for adults—not to mention CGI segments that were cutting edge—it's a show that we can still enjoy today.
We certainly aren't too old for a Beej on a Saturday morning. What? That's his nickname! Get your mind out the gutter!