Yes, Dragon Ball Z: Fusion Reborn is available to watch via streaming on Crunchyroll. Enter Janemba, a monstrous entity born ...

The first instance of fusion occurred in the movie Dragon Ball Z: Fusion Reborn, where Goku and Vegeta used the Fusion Dance to create the form of Gogeta and defeat the villain Janemba.

The stage was set for Majin Buu’s successor when it was revealed that Anisu had taken a piece of the pink powerhouse during the events of Dragon Ball Z’s final ... a perfect fusion of Buu ...