So base on the dragon ball multiverse tier list I'm putting him at for base, ikari, potential at SSJ3.
A/N: in-front of uub U18/U13 Vegeta SSJ3
Super Saiyan LvL: Mystic Tier
A/N: Infront Of Gotenks SSJ3 U(16)normal fusion/ Cell U(17)
Super Saiyan Two LvL: Slightly Behind Bra
After training with older version
He becomes Adult Gt Goku LvL of power after
Baby Arc.
After training with older verison
Ikari(previously locked and now unlocked)
Potential Unleashed
Super Saiyan two
Super Saiyan three
Super Saiyan four
Super Saiyan four Kaio-ken x50
Super Saiyan four limit breaker.
Super Saiyan Five. including Kaio-ken x100 (locked)
He has spirit control.
For Vegito
His super saiyan three is possibly on par with BOG goku.
After training
His base including transformations is post goku and vegta beginning Goku black arc.
Transformations then and now.
Super Saiyan
Super Saiyan two
Super Saiyan three
Then
Now
Ikari
Super Saiyan four
Super Saiyan god( Locked)
Super Saiyan blue( locked)
Super Saiyan blue evolution (locked)
Super Saiyan blue Master( locked)
Ultra Instinct
He has spirit control
Son Bra
Before Training with Future Jason
Base form Power LvL: Cell games tier.
A/N: That means she behind Piccolo u(16)/u(18). Who is behind bojack u(6) who is behind dabura (11) who is behind King Cold u(8)
Super Saiyan Power LvL: Mystic Tier
A/N: She in front of Hatchyack u(8). Gasth u(7).
Broly LSSJ(Ghost) u(8). Goku SSJ 3 u(18) Vegeta ? u(18)
Super Saiyan Two Power LvL: SSJ Vegito
A/N: Behind Vegito SSJ and upgraded Gotenks fusion.
Base LvL: resurrection Of F Vegeta (manga)
Super Saiyan LvL: Stronger than Goku black manga SSJ after his zenkai. (First fight)
A/N: The reason why her Super Saiyan lvl is so high is because of the hellish training that the Future Jason put her through before training her for the next LvL because she couldn't control it.
Super Saiyan 2 LvL:
Bra is Stronger than SSJ3 after goku black arc.
After Training with Future Jason
During the fight training with Jason she managed to gain control of her power which allowed her to gain even more strength than before.
Super Saiyan two (Controlled)
Super Saiyan three (locked)
Super Saiyan four (locked)
Super Saiyan four(locked)
Super Saiyan god( Locked)
Super Saiyan God Evolution(locked)
Super Saiyan blue( locked)
Super Saiyan blue evolution (locked)
Super Saiyan blue Master( locked)
Ultra Ego
She has spirit control
Flashback to 16 years back
Capsule Corp
On the day Bra was born Vegito was proud that his daughter had the power that surpassed broly as a baby. Everything was calm until.
Boom
A loud bang struck the ground surprising Vegito and Bulma while also making the young Bra cry.
Vegito: I will go see what outside.
Outside of Capsule Corp
As Vegito flys over he sees that piccolo is waiting for him as well.
Vegito: Piccolo, I assume you saw the pod coming down to.
Piccolo: No I heard it then dende told me about it and used the lookout so I can warn you about it.
Vegito: You think it's a enemy?
Piccolo: Dende did say a mysterious portal open from the sky and even he was surprised that it was a saiyan pod.
Vegito: A Saiyan but that's impossible.
Piccolo: I know so it could be an enemy for all we know.
Vegito: That all. Well nothing that I can't handle.
Once they got to the crash site of the Saiyan pod Vegito opened it and both of them are surprised to see a
Vegito/Picoolo: A baby???
Timeskip
As everyone now present was there to celebrate the birth of bra what now turned into that of confusion and mystery of this baby Saiyan.
Gohan: So the fact is that we don't know where this baby come from.
Goten: And what are we going to do about the baby.
Vegito: I haven't figured it out yet so I'm taking him to elder Kai to see if he have any answers about it yet.
Using Kai-Kai him and the baby left the World of the Kai's.
Elder Kai: Hmmm interesting development here.
Vegito: What about it?
Elder Kai: Somehow this baby gave god ki and normal ki. This is indeed a rare case.
Vegito: Your saying there haven't been a case of where mortals have mixed ki.
Elder Kai: Vegito as you know you are able to sense the energy of the supreme Kai because he have both ki god and normal. A mortal only have one set of ki.
Vegito: So is it possible for a mortal to have god ki.
Elder Kai: If trained well yes. Vegito you have to nurture the boy to make sure he doesn't lose control. Once old enough he can become stronger than you.
Vegito listening while looking at the baby.
End flashback
As the two warriors are flying to the location eagerly ready to prove who is superior bra then asks.
Bra: Want to make another deal
"What is it."
Bra: Who ever wins have to do what the other says.
"Sure."
As he says yes bra blushed and then thought back to a few months prior.
Two weeks before Son Jason left.
"Hah"
As he slams a kick that causes a crater because the older version of him dodge it then he did a spin flight kick making him block it with his arm and he back flipped and threw a fast jab which he caught it causing a shockwave.
Son Jason: What wrong.
"Do you remember what it's like felling in love for the first time?"
He lets go of his fist as the older version proceeds to uppercut which he leans back to dodge and the older version did a swift kick to the leg causing him to jump.
Son Jason: Of course I do why you ask?
"It's because I think I might be falling in love."
Son Jason: Your in love with bra aren't you.
After throwing a another punch they started moving at high speed causing the ground below to form a crater bigger and bigger.
"Yeah I knew her ever since we were young. Even though we were raised in the same house it didn't even occur to me that I did love her after she kissed me on cheek."
Son Jason: Do you see her as a sister?
"No. Best friend even though she won't actually admit it. And a rival as well."
Son Jason: Oh really and what would you describe her as.
"She has a overbearing personality, and she headstrong as well. And including how strong she is to."
Son Jason: Ha You really are a saiyan.
"What's that supposed to mean."
Son Jason: It means saiyans only like strong woman.
"So your saying that I have chance."
Son Jason: Of course. And besides she a saiyan as well so like Saiyan like strong women the same could be said for her.
End flashback
Wasteland
"This is the spot where Goku and Vegta first fight."
Bra: And now we will fight here to see who the strongest.
"Are you ready for this bra?"
Bra: You know it.
Begin
He charges towards her starting off with a right jab as she moves to the left and then blocks the left and. He spins with his right knee as she uses her left palm to stop the hit and the other hand to move the attack from his left hand.
He smirked then back up and jump using his force to do an axe kick as bra got out of the way causing the rock like tree to split.
Getting out of the rubble he god in for another kick as she dodge it and is now upside down. Blocking a punch that causes her to be thrown back and flips up side down and ducks from a roundhouse kick until she finally catches the second kick .
After tossing him like a rag doll they started clashing at high speed until he punched her into a mountain causing a crater. Doing it multiple times until she caught hit his fist and spartan kicked him off of her.
While following up the attack with multiple strikes to the stomach and then an uppercut.
"I see the training from my older self have made you stronger."
Bra: I'm in full control thanks to him during the hyperbolic time chamber and now I'm going to show you just by how much.
"Don't think that I haven't gotten any weaker bra."
Proving this by moving faster as she tries to hit him when he first appears then dodges locks on to her using his body to propel downward like spear fast and hard to create a crater that is a size of an lake.
Now moving faster than the eye can see in the first time they reappear you can see Jason dodging a punch from bra and then bra doing the same as well.
Trying to get the upper hand both powering up to the max in base. Bra got the first punch in the stomach as Jason got the kick in the head.
Flashback two weeks before Son Jason left
After Bra had completed her mental training for today they went back home for a break. Inside the kitchen bra is looking for something to eat and hear her mother voice.
Bulma: So when are you going to tell him?
Bra: Tell him what.
Bulma: That you love him of course.
Bra: W-what mom don't say that he still might be here.
Bulma: We both know that he off with your father training.
Bra: Is it that easy?
Bulma: I notice how you were looking at him after he helped control your power you started looking at him more than you care to admit.
Bra: But wouldn't it be kinda weird because we we were raised in the same house.
Bulma: Bra he was only a baby there was no where else for him to go and a saiyan baby at that to. We took him in so you would have someone to play with as well. Now both of you have grown up to respect each other. And with the way he looks at you it's safe to say he loves you as well. Did you think of him as a brother.
Bra: No he's my best friend even though I don't want to admit to him. And he's my rival as well
Bulma: oh really and what do you see in him.
Bra: He's strong, kind and always helping me when I feel down. And I always have fun when I'm with him as well.
Bulma: Well that settles is it your in love with him.
Bra: Then how can I tell him.
Bulma: Well you can tell him with words or by actions.
Bra: And what about dad?
Bulma: I will keep him busy.
End Flashback.
Timeskip
Both batter bruise beaten each other till none can move and have ran out of energy as it is almost noon.
"*breathing heavy* Y- you sure you don't want to give up"
Bra: *breathing heavy*I- started this I will finish it.
"I will get in the last punch."
As they both throw in the last punch with little energy left he then misses and bra landed her which causes him to fall back on the floor.
Bra: I did it.
And that was when she fell on top of him from running out of energy.
" So now what do you want me to do."
Remembering what her mom said she decided to act, and she kissed him. As this lasted for two minutes they then stop.
Bra:I love you Jason.
" I love you too Bra."
And end chapter
Two young saiyans that are rivals now lovers where will it take them.
Next chapter the start of multiverse tournament.