a) The cartoon(s) do not have to be currently airing. Canceled and Ended cartoons are all fair game.
b) The cartoon(s) can be from any country.
c) This is a list thread so please explain why you want a crossover and maybe even add a small storyline. Nothing the size of a fan-fic please.
Yin Yang Yo/Dave the Barbarian - These two shows have some similarities. The heroes aren't the best at what they do but they get the job done, their enemies are almost always comical except for a few of them and Chuckles the Silly Piggy and Carl the Evil Cockroach Wizard could make a great evil duo with their magic.
Billy & Mandy/Invader Zim - Can you imagine what would happen if Gir and Billy met? No one would be safe. I think Mandy would try to help Dib but Dib would be too busy trying to nab Grim. Billy would be making things much worse for Zim by almost killing himself with Zim's weapons.
Spongebob Squarepants/The Snorks - It would be cool for Spongebob and Patrick to get stuck wherever the Snorks live and get scared like in Rock Bottom.
Beavis & Butthead/Ed, Edd n Eddy - I'm not sure why i want to see this but it would just look funny as heck. Perhaps B&B would hit on Nazz while Eddy tries to use B&B's tallness for a some scam he made up.
Foster's Home for Imaginary Friends/Pokemon - When Ash arrives at Foster's he thinks that all of the friends are Pokemon and then starts capturing them. This makes Bloo once again imagine himself as the Bloo Superdude who has the take down the evil captor or something like that.
Bookmarks