Dragon Ball Z Movie 12: Fusion Reborn

Synopsis:

A giant mistake caused the soul-filtering machine in the Netherworld to break down, which resulted in the release of the giant demon known as Janemba. His powers merge the dimensions together, causing dead people to return to life. Meanwhile, on Earth, the Z-Fighters are facing all kinds of foes. Goku and Pikuhan are sent to take care of Janemba, but their powers are no match for the monster. When all hope seems to be lost, however, Vegeta suddenly appears to aid Goku in the struggle, giving Goku the solution to taking down this mighty opponent!