Third person
In this form, Goku gains the upperhand, and forces Vegeta to use one of his signature attacks.
Flying straight up into the air, Vegeta powers up and unleashes his Galick Gun at Goku and the earth. Unable to move for fear of letting the blast hit the earth, Goku charges up to Kaio-ken x3 again and launches his own Kamehameha at Vegeta.
The two blasts collide intensely, and Goku finally gains the upper hand by stepping up his Kaio-ken to x4. The Kamehameha overpowers Vegeta, who goes flying into the air. However, this leaves Goku's body devastated.
James POV
I managed to arrive just in time to see Goku on his knees. Yajirobe, who had been hiding nearby the entire time, comes out to congratulate Goku, however when Goku says Vegeta is not defeated, he quickly hides again.
Up in the air, Vegeta is enraged that Goku was able to surpass him and decides to transform into a Great Ape, however he discovers that the moon is gone. He flies back down to the ground and creates a Power Ball, that simulates a small moon at the cost of a significant amount of Ki. He then throws the Power Ball in the air.
James: Shit
I quickly appear behind Vegeta and quickly extract one of his cards.
*Vegeta*
[ Elite Class Saiyan ]
[ Ki control B- ]
[ Martial Art A- ]
[ Galick Gun ]
[ Power Ball ]
[ Would you like to change your physic from Low Class Saiyan to Elite Class Saiyan ]
[ Y/N ]
I clicked yes and immediately I felt myself change. After a few seconds the feeling disappeared. And Vegeta started growing. I quickly looked up into the Power Ball and also started changing.
Third person
There stood two Great Apes. During this time, a shocked Goku has an extended flashback of his adoptive grandfather warning him of a monster outside during a full moon, Kami contemplating cutting his tail off, and finally remembers himself as a Great Ape destroying both Emperor Pilaf's castle and the stadium at the World Martial Arts Tournament, realizing that he was the one who destroyed both and crushed his grandpa to death.
Goku manages to blind Vegeta with a Solar Flare and then attempts to create a Spirit Bomb, however Vegeta discovers it and shoots a Mouth Blast at him, causing him to lose most of the Spirit Bomb energy. All of a sudden Vegeta was punched by James who finally gained some control over him self.
What happened next can only be described as a animal fight. The two giant beast clashed as they shook the ground and destroyed the mountains.
Jame POV
After finally gaining control over the Saiyan instincts I punched Vegeta. We the started fighting. At first we were even but slowly Vegeta started pushing me back. Fortunately Gohan and Krillin notice the strange power ball and rush back to aid Goku and me.
Goku shot two ki blasts blinding Vegeta. I punched Vegeta in the stomach followed by a upper cut. Krillin quickly charges a Destructo Disc to try and cut off Vegeta's tail. Vegeta senses the attack, and dodges it. Yajirobe, however, proves himself to be useful by cutting off Vegeta's tail himself. Vegeta reverts to normal, and is obviously upset.
Vegeta decides to attack Gohan, but Krillin intervenes, and is quickly disposed of. Goku calls Krillin over to him, and tells Gohan to fight Vegeta. Gohan holds his own, but is clearly outclassed. I suddenly slap Vegeta but he dodged my hand. He then destroyed his power ball reverting me back to normal.
Goku hands off the remaining energy he gathered in forming the Spirit Bomb to Krillin, and King Kai tells him telepathically to throw the Spirit Bomb at Vegeta when the moment is right.
Vegeta backs Gohan into a corner, and Krillin is about to throw it, however Yajirobe yells at Krillin for waiting so long. Vegeta hears this and manages to avoid the Spirit Bomb, and it heads right towards Gohan.
Goku telepathically yells for Gohan to bounce it off, since the ball can not hurt those who are pure of heart. Gohan succeeds, and sends the ball hurling back at Vegeta, who, having just evaded it once, has no time to react a second time. The ball hits him squarely and he is sent back into the air again.
James: Damn I need to practice the transformation not that I will need it any more.
Gohan and Krillin gather around the paralyzed Goku. Suddenly, Vegeta's body falls from the sky. Krillin comments that he's dead, although Vegeta is indeed still alive, albeit with power greatly diminished.
Vegeta attempts to defeat everyone with a giant energy explosion, but it does little and only leaves him drained.
He goes after Gohan but I had enough time to recover so I intercepted Vegeta.
James: Kaioken x2
I could still use Kaioken thanks the [ Regeneration C ] that was able to heal me a little. I started beating Vegeta but sadly I was running out of ki from maintaining Kaioken and Regenerating at the same time. I shot a ki blast at Vegeta using the last of my energy. Afterwards I fell unconscious towards the ground.
Third person
Barely alive, Vegeta calls for his ship using a control remote, however, Krillin gets to him before it arrives.
Krillin is just about to kill Vegeta when Goku telepathically tells Krillin to spare him. In an emotional scene, Goku convinces Krillin to let Vegeta live because he had never fought someone so strong and this made him more excited than scared.
Because of this, Goku desires to have a rematch with him someday; he also expresses a belief that Vegeta may learn mercy and reform as Piccolo did.
Though understandably skeptical, Krillin ultimately decides to trust Goku's judgment and lets Vegeta go. Vegeta vows to make Goku regret sparing him before he departs.