The Rebirth of Fusion! Goku and Vegita!

Summary-

We are back in heaven, during the Budoukai held by Dai-Kaioshin to determine who the greatest dead heroic fighter is. The four Kaioshin's quarrel over who has the best student, and the final round is about to start, between West Kaioshin's Son Goku, and South Kaioshin's Pikuhan. Both fighters want to win cleanly, and they begin sparring.

Meanwhile, King Yamma (Heaven's Gatekeeper) is being harsher than normal, sending many, many souls to hell for one reason or another (the ones going to heaven get to ride Ten Airlines, while the ones going to Hell get to pass through a "Spritz Cleaner" machine that removes all the evil from them. Once cleansed, the evil souls have their memories removed, and are reincarnated to try again). Psych Oni, the demon tending the Spritz Cleaner, is too busy dancing to his walkman tape to notice that the Cleaner is running in the red. The Cleaner regulator explodes, and all of the concentrated evil escapes. Psych Oni tries to contain the mess before tearfully reporting to King Yamma. At this point, the concentrated evil covering Psych takes effect, turning the boy into a giant yellow squeeze toy named Janemba.

Janemba immediately encases Yamma's Gate House in a magic crystal, and it then amuses itself by twisting the fabric of space for a while. With Yamma trapped, the dead residing in Hell can escape and roam around on Earth. Gohan and Videl set out to combat the dead, while Goten and Trunks search for the Dragon Balls to set everything right again. Gohan gets to confront Freeza again, and very quickly destroys the monster. All of the other supporting villains from the previous DBZ movies also surface, only to be dispatched by the Great Saiyaman team.

Shenlong is summoned, but the Dragon God has to admit that it has no jurisdiction over the dead, and it can't fix the problem involving Yamma. So, Goten and Trunks spend the movie fighting the endless masses of Hitler's zombie armies. (Satan is also dispatching zombies easily, but he's upset that there's no TV crew around to broadcast his exploits; he plans on calling in a report to the TV station later.) Dai Kaioshin suspends the Budokai to let Paiku-han and Goku run off to Yamma's GateHouse to resolve the problem.

At first, they try to play with Janemba, until Goku starts getting mad. Unfortunately, Janemba can do transdimensional tricks, and it punches one way, only to have his fist appear elsewhere to blindside Goku. Pikuhan is told by Dai-Kaioshin to try to free King Yamma (eventually, Pikuhan realizes that by swearing and insulting people, he can make the magic crystal crack and flake off.) Janemba can also make copies of itself, as well as warping Goku so that the hero will appear in front of his own Kamehameha. Goku switches up to Super Saiyan Three and pummels Janemba. The creature melts, only to turn into the next-stage version -- Warrior Janemba.

Janemba now uses a series of warp tricks and trashes Super Saiyan Three Goku. Goku escapes deeper into Hell, first hiding in the Pool of Blood; then he gets rescued by the dead Vegeta. (Vegeta reminds Goku that only Vegeta has the right to destroy Goku.) Vegeta powers up to Super Saiyan Two, attacks Janemba, and also gets trashed. Vegeta's body flies towards the Mountain of Needles, and is caught by Goku. Goku tries to get Vegeta to do Fusion with him, but the Saiyan Prince would rather die first (Goku points out that Vegeta is already dead.) Vegeta's pride is tearing him up, and Janemba attacks the mountain, causing Goku to grab Vegeta's shoulder and teleporting them both to a safe zone.

Vegeta relents, and Goku shows him the Fusion pose. Vegeta is appalled at the idea of having to do something so stupid. But, there is no time left, so the two of them perform the Fusion Dance. Vegeta forgets to extend his right forefinger, and the resulting Fat Gogeta attracts Janemba's attention. The ensuing battle is plain slapstick (Fat Gogeta's only successful attack is a series of foul-smelling farts.) At the last moment, just as Janemba is going to destroy Fat Gogeta, the Fusion wears off (it took 30 minutes) and the two Saiyans run away again.

Kaioshin (West Kaioshin was receiving a lot of abuse from his siblings for having such a useless student) telepaths out that Vegeta botched the pose. So, they try again. And are interrupted by Janemba. Pikuhan succeeds in breaking the magic crystal, and he runs to confront Janemba to give Goku and Vegeta more time.

Janemba apparently kills the dead Pikuhan just as the Fusion takes hold. True Gogeta looks a lot like Super Saiyan Goku, with a Persian-style vest and baggy pants. On Earth, Goten and Trunks sense the energy levels of their fathers, and the two boys also do Fusion to become Gotenks (Gotenks uses Kamikaze Ghost Attack to create 100 exploding ghosts to destroy Hitler's armies.) Gogeta punches Janemba up a bit before hitting the monster with a special energy ball. The ball blows up in the monster's chest, and all of the evil within it dissipates.

Psych returns to normal, takes one look at Gogeta, and runs away screaming. King Yamma is back in charge, and the dead all return to Hell (including Vegeta. Vegeta says that he never wants to Fuse again.) Goten and Trunks promise each other to not tell Gohan and Videl who it was that saved them all; Gohan and Videl chase the boys to get answers from them. In the last panel, Shenlong asks if this means that no one is going to ask him for a wish.