Goku was on the PTO pod to Earth, wearing the traditional clothes of the Yadrat. He was a bit nervous, taping into his forehead with two fingers several times. "… This is bad, there are two powerful energies on Earth" he tapped another time "One of them is Freezer, maybe I should hurry up and use my new technique to get there faster"
The Saiyan concentrated on Freezer's ki, he had to appear there fast before someone was killed. Then he stopped, he felt a third powerful energy signature, he felt some aggression into it, directed at the other two. He retired the fingers and decided to wait for the moment.
"Now they are fighting… the new guy is pretty strong, and I can feel that he is still holding back" he smiled "I gotta fight him, if he doesn't mind a friendly spar" then he opened his eyes wide "Oh, that's the other one, its accumulating ki, and it's overwhelming… the third one should not be playing around now if he wants to win… but on the bright side, he will pose a great challenge… I'm getting excited"
Then he felt the high and sudden increase in energy of the third warrior, nearly matching the second one. Freezer energy disappeared and the other two were having an intense battle. Goku wanted to get there and save his friends, but also didn't want to interfere in such a fight. Then he felt Piccolo getting involved, and then Gohan and Vegeta… he doubted for a second and then he felt the powerful supernova "Oh, damn it! Earth is in danger, I have to get there quickly!" he concentrated on the first energy signature he could feel and disappeared from the pod.
He appeared on a barren landscape, but still away from the fight, seeing the two supernovae fighting on the horizon "… I must work on my aim, I got too far away from the place i wanted to…" he sighed relieved when the third warrior won "It was close… Earth was almost destroyed there"
When he was about to go to the battleground, he felt the newcomer going into his direction, so he just waited. The frost demon landed in front of him, Goku was surprised to see his resemblance with Freezer. The Saiyan put his hand on his nape.
"Ey" he said with a goofy smile "Thank you for saving the Earth, it's nice to see that you are a good person after all"
"You are certainly as naive as I have heard" Cooler smirked before he put a more serious face "Transform into a Super Saiyan, now"
He was taken by surprise, but seeing the really serious stare he decided to comply. A yellow aura flared around him and his hair turned the same color. His hair turned even spikier and his pupils a turquoise color. Piccolo and Vegeta, who were tired and slowly flying to the place were truly impressed. Vegeta saw the Golden transformation before, on Namek, shortly his revival, but now Goku was even more powerful than before.
Cooler was looking at his own hand, surely wondering if he could or not defeat him with the energy he had left. Goku smiled again "Ey, you truly seem strong. Do you mind if I ask to fight with you? I know you look pretty tired, that wouldn't be fair… but don't worry, I can fix that, just give me a sec. Right?"
Cooler was quiet and silent for a few seconds and then he nodded and smirked "Of course, I'll be here waiting eagerly for our fight" Goku returned to base and used his instant transmission technique to go somewhere else. Cooler was waiting patiently waving his tail around until Goku reappeared again, throwing him a green bean.
"It fill refill your energy you just have to…" said the Saiyan as the other caught it
"I know what a Senzu is, thanks" interrupted Cooler swallowing the bean and feeling how his energy flared again.
"This is a bad idea" commented Piccolo, Vegeta just replied with a "Hum!". Then Goku saw the two "Ey guys! How are you doing? Sorry, I'll have to catch you later. I have to spar with this guy!"
"If you don't mind," said Cooler looking at the rocks "I prefer to fight somewhere else, you know what I mean"
"A more isolated area?" asked Goku "Of course! Follow me!" The saiyan said taking flight and the frost demon followed suit. They both landed on a rocky wasteland, and they transformed right away. They charged each other, clashing several times on the sky, only visible when they collided, blocking each other attacks.
On one of these clashes, Cooler grabbed one of Goku's leg with his tail and punched him hard in his stomach. The Saiyan felt a lot of pain as he flew around the rocks until he was kicked on the back, sending him to the ground. Then the frost demon launched a devastating ki blast to the area, making a huge crater.
The golden warrior emerged from the crater, with his shirt reduced to shreds and with burns on all his skin.
"Not bad" praised the other "You are quite hard… My apologies, I got carried away, its difficult to control my power when I'm in the Augmented Form"
Goku took a moment to regain his breath "Damn! That attack was with actual killing intent… this is more than a friendly spar…" he half smiled as he charged "You will have to try harder than that to kill me!"
They both clashed again, with barrages of hits and blocks. Then Cooler created some space between them to launch a powerful ki wave to Goku, who dodged just in time. "Uh…that was close" Then the ki wave exploded just behind him, sending him flying, he then just used a rock to stop and started charging a Kamehameha. His rival prepared his position to answer the attack with another. "I might try…this" was thinking while charging his attack "Kaaaa… meee…haaa…me…" then teleported just behind Cooler and launched the attack on him. Coolers eyes widened as the blinding energy filled everything.
There was a huge cloud of dust filling everywhere. When the dust dissipated Cooler was standing there, with a burn on his shoulder and the plated over them missing "That was close…" said the frost demon "But I was half expecting that since I saw your technique"
Goku smiled, his idea kind of worked, he just needed to think something else. A direct approach was a bad idea, but maybe with some creative tactic, he could win. He then charged to his opponent who blocked his attack, only to find out that he just hit an afterimage. The real Goku kicked him in the neck, sending him flying. Then he started firing a barrage of ki blasts "He probably senses energy, that should confuse him". The next step was to teleport just below him, sending the tyrant flying upwards with a powerful ki blast. Finally, he soared to the sky and hit him with two hands towards the ground, making a big crater to then use the barrage again.
The saiyan couldn't feel his enemy ki anymore and now was sensing around, trying to find him. It was impossible that he was killed. Then, just in the moment he felt the energy, he received an eye beam to the back, making him fall. He managed to regain the balance before hitting the ground and then charged upwards. Cooler smirked and raised his hands to his face, using a technique he learned not long ago, a technique that Goku knew but was not expecting "Solar Flare!". While blinded, he felt a tail coiling around his neck and a barrage of strong fists to his chest. All his body was in true pain and when he regained his sight he was on the ground, with Cooler pointing at him with his finger. "Any last words monkey?"
The saiyan tried to move his body, but it refused to move, still battered by the attack. The tyrant was silent for a few seconds, but the murdering intent disappeared and he lowered his hand "In three years, May 12th at morning, 9 miles south-west of south city" he told at the confused look of Son Goku "A destructive duo will appear and kill all your friends."
"Wait… how do you know all that?"
"I come from the future, just to warn you. Also, they are even stronger than me. Even more, you won't be alive to fight them, a virus will kill you."
"That's… a huge load of info out of nowhere"
"I'll give you some medicine to save you from the disease. I'll join you when the time is right, I have a pending business with the pair. Now my mission here is done, whatever you do with this information, is not my problem."
Power levels
Cooler (Tired, True Form): 80 M
Goku (Base): 4,4 M
Goku (SSJ): 220 M