http://kissanime.com/G/976193?l=http%3a%2f%2fkissanime.com%2fAnime%2fDanganronpa-The-Animation

Dragon Ball Z and Naruto

Two of my favorite and most popular Anime/Manga  (Also One Piece but it's not in this crossover)

This shows if Naruto and Goku ever switched lives they would look like this.

Phineas and Ferb and Ed Edd ' Eddy crossover

Really creative and funny!  I wonder how this scenario will play out?