Midoriya left with Melissa and it was just Goku and Gohan left to fight  the robots

Gohan- he dad, remember back at the tournament when you fought the universe 7 versions of you

Goku- yeah what about it

Gohan- Can you go Ultra Instinct Again

Goku- yeah but no

Gohan- WHAT DO YOU MEAN YEAH BUT NO

Goku- well I can go into the omen form but the mastered form that was only through his threats of killing everyone in my universe, and clearing my mind which is very hard in the middle of a battle, so yes I can do but not right now

Gohan- I'll cover you but make it quick

Gohan then fires a Super Masenko destroying some of the robots

Momo- Gohan I'll back you up

She went Super Saiyan and fired a Kamehameha along with everyone else firing regular ki blasts

one of them began to shake and charged at them ready to explode but before it could a wave of air sent it back destroying most of the bots

Gohan- Dad

Goku- ready

he zipped through the bots and they exploded from multiple punches 

Momo- That's it Ultra Instinct

Goku- let's go we have to Catch up with Midoriya

They Caught up on the roof and it was utter destruction

Goku noticed a giant boulder being thrown towards him and with no time to react he put himself in front of it destroying it yet

he fell next to Midoriya who helped him up

Midoriya- You okay Goku

Goku- heh, look at yourself you're pretty beat

Midoriya- yeah I'm on my last leg

Goku- I have one last idea, GOHAN, THROW EM

Gohan fished in his pocket until he found 2 earrings

Gohan- HERE 

he threw them at goku as he caught it

Goku- good and there should be one more

Goku pulled out a senzu and broke it in half giving it and the potara to him

Midoriya- Fusion

Goku- Yep it's our last chance

they ate the bean and put the potara on and a bright light appears and one person stood left

???- I am neither Izuku or Goku, I, am, Midoku

he then noticed the villain and went Ultra Instinct

All Might- How

Midoku- It's my quirk, One for Instinct, One for All and ultra Instinct Combined into one

All Might- well then Young Midoku, May you assist me in defeating this villain

Midoku- Got it

Goku and Midoriya- DETROIT SMASH

Midoku then fell to the ground and defused

(Because of Potara logic)

Goku- whew I'm beat

Midoriya- me too

Momo- GOKU

Ochaco- DEKU

the girls picked their boys up and kissed them

Goku- hey chill out were still hurt here

Momo- Sorry

(The Next Day)

Goku- Going back to time-traveling huh Gohan

Gohan- yeah, duty calls

Vegeta- good luck trunks

Trunks- thank you, father

they got in the time machine and returned to their timeline

Momo- well we should be on our way anyway

Goku- yeah my dad already left so you're my ride

Momo- again

Goku- whatever you know you like it

Momo- yeah I do