Welcome to my first one shot, I'll Teach You! This is basically a what if story about what if Cooler defeated Goku and went on a teaching spree! I do not own Dragonball Z. Review!
As the massive ball of energy was thrown at Super Saiyan Goku, Cooler was more than convinced that he had won this battle.
"Foolish primates," he taunted as Goku caught the ball, trying to stop it from hitting the ground, but it was to no avail. The ball was quickly overpowering the Super Saiyan, Cooler laughing as Goku struggled. Goku gritted his teeth as he looked and seen a bird fly past him, the essence of nature giving him the strength he needed. His aura began to intensify as he felt the ground shake underneath him, the ball bringing Goku into the ground. Goku closed his eyes as he concentrated his energy and began to try to push the ball back at Cooler with a Kamehameha wave, Cooler looking in surprise as he watched this.
"I'll teach you!" Cooler screamed as he sent a giant ki blast at his massive ball of energy, the entire thing exploding with Goku underneath it. Goku screamed in pain as he was vaporized, the massive ball exploding and piercing the Earth's core as well. As the planet prepared to explode, Cooler prepared to escape the planet, flying higher into the air. He was surprised when he looked back and seen the Saiyan's son, Gohan, looking at him with an angry look.
"You killed my dad?" he asked in a low voice as Cooler snickered.
"And what if I did?" Cooler asked as Gohan's aura began to surface, Gohan looking at Cooler angrily. He ran at Cooler quickly and began to throw punches at Cooler quickly, Cooler swaying from all of Gohan's punches. He then kneed Gohan in the chest quickly, Gohan gasping in pain as blood flew from his mouth. Cooler then followed up by slamming his fist into Gohan's cheek, a indent in Gohan's face where Cooler hit him. Cooler then pulled his hand backed and slapped Gohan to the ground, Gohan crashing into the ground. Gohan began to breath heavily as he looked at Cooler, tears filling his eyes.
"I won't let all these people die for no reason," Gohan said as he pulled himself up, Cooler using his speed to appear in front of Gohan instantly.
"Are you holding out so that I will die along with this planet?" Cooler asked as Gohan looked at him with one eye opened, one eye closed. "Nice try kid, but by the time this planet explodes, I will be in another galaxy and you will be in Otherworld."
"I guess you and Frieza are just too smart for me," Gohan said as he chuckled softly. "But I'm not finished yet!" He ran at Cooler again, Cooler sighing as he did. Gohan tried to kick him quickly, but Cooler used his speed to instantly appear behind Gohan and pierced him in the back with a Death Beam. The beam went through his back and out the front of his chest, piercing his heart. Gohan turned slowly as his brain didn't register the pain for a second, Gohan stumbling before he fell to the ground. Cooler shook his head as he flew up into the sky and escaped from the planet. He watched from a safe distance in space as Earth blew up, turning into space dust.
"I taught you!" Cooler said as he looked at where Earth stood, chuckling softly.
Yeah, just a short little story I wrote. Tell me how you liked it. Or I'll teach you!