Tristan went through a tough test set up by Goku to see how strong he really was. Curious, Goku asked Tristan how he planned to fight without flying. Tristan explained that he had other ways to move through the air and was eager to start the fight. He charged at Goku with impressive speed, forcing Goku to dodge his attacks. Despite Tristan's repeated attempts, Goku easily avoided each one, quickly getting used to Tristan's moves and landing some hits of his own. Using a wind-based move, Goku sent Tristan flying backward. When Tristan leaped at Goku again, Goku powered up, making it even easier to dodge Tristan's attacks. Disappointed that Tristan wasn't showing his full potential, Goku, still holding back his true power, waited for a more exciting fight. As Tristan kept attacking, his moves got sharper and more precise, thanks to his ability to adapt quickly. Switching to defense, Goku hit back hard, sending Tristan flying a long way. Even after the hard hit, Tristan quickly recovered, showing no signs of giving up. He then sped towards Goku faster than Goku could react, landing a powerful punch that sent Goku crashing through a rock formation. Surprised by this, Goku powered up to his Super Saiyan form. In a fierce battle, Goku took control, hitting Tristan with a series of powerful attacks. But Tristan learned from Goku's moves and timing, eventually overcoming Goku's Super Saiyan form.
Goku asked Tristan how he suddenly got so much stronger. Tristan explained that when he gets hurt, his body gets exponentially stronger, allowing him to heal completely. Seeing this, Goku transformed into Super Saiyan Blue and, in a burst of aggression, launched Tristan into the sky, causing him intense pain. Goku kept attacking, sending Tristan flying across space and hitting him with energy blasts, each one landing perfectly. Tristan was on the brink of death until Goku used Kaioken X20, making his attacks even more powerful and putting Tristan's life in serious danger. After a brief pause, Tristan fully recovered, his power having increased due to the injuries he sustained. Confused by Goku's actions, Tristan asked for an explanation. Goku said he wanted to fight Tristan at his strongest to see how powerful he really was. Tristan was hesitant to use the full power he gained from Goku's attacks, fearing the danger of losing control. Goku realized something important when he saw Tristan breathing in space, thanks to his body's adaptation to the environment, which meant he didn't need to adjust himself. Accepting this, Goku attacked again, but his efforts only made Tristan stronger. With a simple flick, Tristan knocked Goku back to his normal state, prompting Goku to reach True Ultra Instinct. Fueled by emotion, Goku fought Tristan with intensity. Tristan, however, took the upper hand, using what he learned from their previous fights. Goku realized that Tristan had a unique ability to control space with hand gestures or create explosions like nuclear blasts, giving him a different way to move through the air. In the end, Goku was defeated, and he transformed into his most powerful form, Perfected Ultra Instinct, for a final showdown. Tristan, using the strength he gained from the fight, surpassed even Goku's ultimate form, knocking him out of it. Victorious, Tristan brought Goku back to Earth, resetting his powers to their normal level.