Editing Goku (Dragon Ball Heroes) (section)

====Prison Planet Saga====
At some point after the Tournament of Power, Goku and Vegeta are back to training with Whis on Beerus' planet. Future Trunks and Future Mai travel back in time and Future Trunks trains with Goku and Vegeta. Future Trunks is kidnapped and taken to the Prison Planet, so Goku, Vegeta and Future Mai head there to rescue him.

On the Prison Planet, Goku encounters another Goku, both Goku's see that the other possess a form that the other does not have (Goku with Super Saiyan Blue and Xeno Goku with Super Saiyan 4) and so they wish to see who is stronger, the two seem evenly matched but in the end Goku defeats Xeno Goku, who notes that Goku is a step above him. Goku questions Xeno Goku, but finds they are on the same side. Fu arrives and explains the situation and how to escape the Prison Planet - by obtaining the seven special Dragon Balls held by the prisoners.

In the anime, shortly afterwards they are confronted by the evil Saiyan Cumber. After Goku transforms into a Super Saiyan 2 and attacks Cumber, he loses all reason having come into contact with such evil ki and mutates into a Super Saiyan: Berserk where he then then begins to attack Vegeta instead. After Future Trunks arrives with Cooler, Cooler transforms to become Golden Cooler and with his newfound strength defeats Goku with a single punch causing him to regain his senses. After Mai tosses him and Vegeta a pair of Potara, the two fuse to become Vegito in order to fight against Cumber.

After using up all their power in the fusion, they return to their individual selves only to see a Golden Great Ape Cumber standing in front of them. Goku attempts to battle it as a Super Saiyan but is quickly beaten and stepped on. In order to escape from being crushed, Goku transforms into a Super Saiyan Blue and proceeds to use the Kaio-ken X20, but the battle is interrupted by Fu who reverts Cumber to his normal state, so he does not destroy the seal surrounding the Prison Planet. Cumber continues to attack Goku who now uses the form of Super Saiyan God but is still beaten beaten and almost killed before being saved by Xeno Goku now with Xeno Vegeta.

Vegeta tries to wake up Goku to get all of them out of here when Suddenly Goku reawakens into Ultra Instinct. With his counterpart in a stunned silence, Goku very quickly overwhelms and dominates Cumber. Goku looks at his counterpart before going back in to finish Cumber. Xeno Goku, knowing himself, asks everyone to grab onto him and uses Instant Transmission to teleport off the planet. Ultra Instinct Goku then defeats Cumber with a Kamehamaha. Before he can finish him, Fused Zamasu arrives and steals Cumber's body away, leaving Goku alone on the blowing up planet.