The time I was fused with my cat and sent into the Dragon Ball world

Divine Face-Off

Standing in Primal Blue already, I look out into the sky, waiting.

Future me in his own Blue form, waits alongside an Ultimate pair of Gato.

Goku stands in Super Saiyan Blue alongside Vegeta.

Present Zamasu waits with a concerned expression.

The skies twist in a storm of black and pink.

"He's here." I calmly say, my red eyes focusing on the storm as the blue aura around me crackles with crimson lightning. A blur of pink with crimson lightning lands in front of us all, and I look it in the eyes. Black. "Are you ready to end this?" Black taking this seriously, nods with a glare.
"I'll end you all today, and the Zero Mortal Plan will be achieved." He responds, floating up as I do. Thunder crashes in blue and pink as we float in silence above the city. Reality becomes partially unstable around us, things trembling.

Silence.

...

A building crumbles.

Black and I vanish in streaks of blue and pink. We're dead even now, growing as we fight. Ruined cities collapse. Fires spread. The damage becomes widespread as I fire Kachin blocks at Black, dodging a strike from behind as he teleports out of the way of the blocks. I've learnt how he fights and counter with a ki blade kick that leaves a cut as he moves to block, initiating a clash in the air. The shockwave fractures part of reality.
"This is the level we're at...?" I think to myself as I block one of his punches, appearing behind him with a punch to the back. Another fracture. With every clash of punches and kicks, we damage reality more. Looking at Black as I grab his face, I fly through one of the fractures. "I'm taking you away from here!"

Present Zamasu floats up to the Future Zamasu, the others on standby if things go south. Present Zamasu starts off the conversation.
"Is this what you've become? You're truly disappointing." He says, catching the Future version off guard. He expected someone willing to join him, not someone who berates him, but he doesn't get a chance to retort. Present Zamasu becomes uncharacteristically angry at his future self, raising his voice. "I'm done with standing by and letting you destroy life! You are not what we should be! A Kaioshin preserves life, not destroy it!" Future Zamasu floats back, his thoughts conflicted. "You didn't even question what you were doing!" Future Zamasu takes a moment. He never truly got a say in this. He just agreed to it. He would've died otherwise. Present Zamasu senses this and calms down. "You still have a chance, however. With my friend fighting your counterpart, you can help rebuild this. Fix your mistakes. Atone through Self-sacrifice." Future Zamasu takes a moment more.
"Can I truly fix this?" He asks, his eyes showing conflict. Present Zamasu nods. Future Zamasu becomes more confident. "Then I'll start my atonement. We had a backup plan if he couldn't win against your supposed friend. The Potara earrings. If I swap my earring to my other ear, it'll trigger the fusion between me and Black."

Unknown location.

Black sends me smashing through reality, dealing damage. I easily heal as I flip backwards past a building in some purple shifting barrier, a fight between some form of devils. Appearing behind Black, I kick him into the roof of a building where two people fight. A woman with long red hair and an overconfident immortal man. Black stops himself between them and growls in frustration.
"Why won't you die?!" He shouts as he forms a ki blade, myself forming one in retaliation and clashing it against his, putting the other fight to a halt.
"I don't give up when lives are on the line, especially when I'm trying to kill a body snatching coward like you!" I retort with confidence and frustration, kicking him in the stomach and using ki strings to spin him and slam him into the roof, collapsing the building. While the two others move away and get into the air, I float up and wait. "Get up. I know you aren't done, fucker. I'm putting you down myself, you body stealing bitch." My thoughts dwell on how my language filter as basically gone in this moment, but I don't focus on that for long as I bury Black in Kachin blocks the moment he tries to escape. Firing thousands a second, I make a massive crater and bury him using all the Kachin blocks. Firing a condensed beam at the blocks infused with energy of destruction, I watch a purple blaze detonate across the crater. "How irritating. Even that isn't putting this bastard down." Using ki strings again, I slash down into the blaze to try and strike Black, only for him to blast through and punch me in the face. Being sent flying through reality, another fracture forms as we return to the place I begin to recognise as where Broly and Gogeta fought in the Broly movie. Shaking myself into focus again, I grab and throw Black into another reality.

Black crashes into a britannian city, alarms going haywire as I fly in at Black. Punching him in the gut, the buildings crumble and break apart. Streaks of blue and pink cross the skies as we take to the skies and clash. By forcing Black to split focus between healing and fighting, his power drops faster. An odd machine tries firing at us, but I move past it and throw it at Black, detonating it in his face.

Swatting the explosions flames away, Black looks around and tries to spot me, only to be fired into the sky by a massive blue beam hitting him in the back. The pain burns deep and sends him crashing into a helicopter, but I save the people in time with the multiform, moving them out of it. Though they panic, they get teleported to the ground, and the clone vanishes. Focusing on the fight, I initiate physical combat with Black once more in the skies. The streaks across the skies become faster, both of us going full power now. A crack opens in reality, and we vanish through it.