User blog comment:HiBy25/Idea/@comment-2145190-20100826013734

Here are some ideas for shows you could cross-over P&F with:
 * Kick Buttowski
 * Scooby Doo
 * The Grim Adventures of Billy and Mandy
 * Evil Con Carne (Maybe you could put Billy and Mandy for the A-plot with Phineas and co and Evil con carne for the b-plot with perry and doof :))
 * Invader Zim (I already posted one, but maybe you can come up with a different one/)
 * Despcable Me (Another one I did, but maybe you got another one in mind?)

Well, that's all I got for now. Any of those sound good?