(Side story) the origin of ultra instinct (dbz)

The end?

"This is it. This is how he dies!"
Shouted Vegeta. Goku was so rounded by an aura that's was blue, red and there was a hint of yellow to.
"KA... ME.... HA.... MEEEEEEEEEE..."
Evil goku stood there, acting tough even though he was scared half to death just by looking at him!
"HAAAAAGHHHHHAAHHAAA!"
Shouted goku. His ki hitting him merely instantly.
"MY TURN!" Shouted evil Kakarot.
He tried hitting him with a flurry of punches. They either got deflected od dodged.
"Tatatatatattatatattatatatatatat!"
Almost effortlessly, he dodged every single attach punching him, faster than he could flinch.
"Gahhhhhh!" The next minute he was on the ground.
"DAMN YOU KAKAROT! WHAT IS THAT FORM!!! I DEMAND YOU TO TELL ME!" Even the real Kakarot was surprised at what he was doing.
"I WILL CALL THIS..." these words coming out of his mouth would start an entire trend, saiyans dying because they would try skipping all 7 other forms.
"DA- damn y- you Kakaro"
He coughed blood Before he could Finnish his sentence.
"Now tell me the real reason you are here you damn villain!"
He hesitated at first, but he knew this form was way to powerful for his top form.
What was his secret.
Was he undercover? He couldn't be, or he wouldn't of revealed he was him.
He took a breath almost as if he was about to say something to Kakarot.

Could it be his father. There is no way...

Words started coming out his mouth.
"Fine I will tell you."

Summary: a threat came to earth hoping to find our main protagonist Kakarot. Little did he know he would get in an intense battle against himself. He ended up having to use some of Vegeta s power. Which ultimately got him A new form, called ultra instinct he was beaten down until he gave in at told him the back story.