Tekka meets Goten and Trunks after Ziku mistakenly leads Tekka to Nappa and Raditz. Pinich leaves Tekka as he considers them to be his rival and goes off in search of his own teammates. Bulma gives Tekka Ziku, a robotic Timespace Radar she developed that she believes will help Tekka in their quest and suggests they seek out Goten and Trunks who were also looking for teammates for the tournament. However, before they are able to get to the tournament, they must first make their way through 4 areas connected by Korin's Tower.

After being sucked into the Timespace Rift after making their wish, they are informed by Bulma about the Timespace Tournament, a contest where fighters from throughout all the Dragon Ball Timelines come together to fight an see who is the best. This wish resulted in the creation of the Timespace Rift, a warped dimension connected to and/or containing locations from various eras/timelines and parallel dimensions like Other World. Rather, it revolves around the exploits of the customizable main protagonist Tekka and their friend/rival Pinich who use the Dragon Balls to summon Shenron and wish for the greatest martial arts tournament ever, resulting in the rest of the story to take place. Unlike other Dragon Ball games in the franchise, Dragon Ball Fusions does not follow the story from the manga or anime. Select runners-up will also receive an “Extreme Heroes W (Double) Pack” signed by Masako Nozawa. In conjunction with the game, Shueisha and their partners ran a contest where entrants could submit their own designs for two Dragon Ball characters fused together, with the winning design(s) to appear in the game, as well as a special “manga project” in Saikyō Jump by Hiroshi Otoki.

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