Super Dragon Ball Heroes

Goku and Vegeta's training is interrupted by the arrival of Future Mai, who reveals that Future Trunks has been captured by a mysterious figure named Fu. Fu explains that Trunks is being held on the "Prison Planet," a place where warriors from different timelines battle as part of an experiment. Upon arriving there, Goku, Vegeta, and Mai encounter an alternate version of Goku known as Xeno Goku, who engages Goku in a battle featuring clashes of Super Saiyan forms. During the fight, they discover that an invisible barrier prevents escape. Fu then vanishes, and the two Gokus team up to find a way out.

Goku and his allies face a formidable and malevolent Saiyan whose overwhelming and ominous ki proves nearly unstoppable. As Goku becomes overwhelmed and begins to lose control, an unexpected hero arrives to shift the balance of the battle.

Goku and Vegeta use the Potara earrings to fuse into Vegito Blue to confront the transformed Cumber, who unveils a powerful new form. During the battle, they test their limits by merging their strength and techniques, including the use of the Kaio-Ken.

Cumber transforms into a powerful and fearsome state, overpowering the restraints of the Prison Planet as his chains begin to break. Seeing this, Fu becomes enraged and activates his own hidden abilities.

Faced with Cumber's seemingly limitless power, Goku and his allies find themselves in a dire situation. Xeno Goku and Xeno Vegeta arrive to help, having detected unusual activity on the Prison Planet. To better match Cumber's strength, they use the Potara earrings to fuse, forming a powerful new warrior.

After a long and intense struggle, the Ultra Instinct technique is triggered. With the Prison Planet on the verge of collapse, a climactic battle takes place, the outcome of which determines the fate of all involved.