Good idea of Crossover fanfics

I need some ideas for crossovers of all kinds.It can be anime,cartoons,and etc.

Regular Show + Rocko's Modern Life

idk.

Haven't wacthed Rocko's Modern Life in ages.Thanks for the idea

1.When the KND visit the Cul De Sac to "live there " there the Edds and Cul De sac kids will find more then there bargaining for.

2.When Courage Eustece,and Muriel take a Vacation at the Cul De sac they'll have to solve a mystery to a case.

3.When Mandy visits Foster things turn bad to worse and Billy,Grim,and the foster Gang need to stop her.

4.When Lazlo,Raj,Clam are sent into the future to the Land of OOO. They meet Finn and Jake. Will they survive this adventureist land or become a bloody pulp.

5.When Chowder,MungDaal,and Shnitzel travel across the Ocean for the rare Cherry Berry Fruit they find an island of discovery called the Land of OOO

6.(This one will most likely gonna be the last one to upload. I need more information on the characters and setting)When the Regular Show gang meet Finn and Jake.

7.When Chowder and MungDaal travel back in to the past where they meet the Eds.The most amazing things will happen.

8.When Fanboy and ChumChum go to the Zoo on a school field trip day they will encounter the most awkward trio,Penguins

9.

Uhh these are ideas that I made a while ago what do you think

9. Flapjack, K'nuckles, and Bubbie go sailing to look for Candied Island only to be brought on a flying sea, land, and sky taxi.(lawl Discovery Kingdom reference) They get more than they bargained for when they get brought to Marzipan City.