Absolute Demolition, Super Saiyan 4 Gotenks

Buu looked at Gotenks.

As soon as Buu saw Gotenks he knew that he would be troublesome to handle as Buu knew he would be unable to defeat him even in his base state.

But Gotenks does not want to kill Buu. He wants to humiliate him.

The Goten side of Gotenks hates Buu for what he did to Gohan.

The Trunks side of Gotenks hates Buu for being responsible for the death of his father.

Gotenks quickly transformed into Super Saiyan, Super Saiyan 2 and Super Saiyan 3 as he started at Buu who looked shocked.

Buu was terrified.

Not only that the enemy in front of him able to kill him in his base form but also transforms into stronger forms.

He was horrific as he knew that even if he absorbed Kibito Kai and Bra he would not be able to match the power of Super Saiyan 3 Gotenks in front of him.

Gotenks smiled at Buu when he saw his terrified face.

"Fusion?" Bra said as she looked at Super Saiyan 3 Gotenks.

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In the scared world of Kais.

"Oh. It's Metamoran Fusion." Old Kai said as he watched the battle through his crystal ball.

"Still. Fused warrior who is a Super Saiyan 3. It looks like this is finally the end for Majin Buu." Old Kai said while smiling.

"Go Goten. Go Trunks." Marron and Dende cheered for their friends.

"Wait. What is happening? Why is the ground shaking? No. It can't be." Old Kai said as he realised what was happening.

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In the afterlife. In King Yama's office.

Goku and Vegeta are also watching the fight through the fortune teller Baba's crystal ball.

"That bastard. How dare he hurt my princess?" Vegeta who does not have a body anymore said as he was outranged by Buu's actions.

"Calm down Vegeta," Goku said to Vegeta.

"Still to think that they have come this far. I kind of feel proud." Goku said.

"What do you mean proud? I was the one who trained all three of them while you were selfishly training by yourself." Vegeta said to Goku.

He was a little short on temper as he was still pissed at Majin Buu.

"Wait. What is that?" Goku said as he realised that Gotenks still had something that he still had left inside him.

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Back on earth.

"Ha," Super Saiyan 3 Gotenks yelled out as the whole universe started to shake because of his power.

Heaven, Hell and the Earth shake as a mysterious aura surround Gotenks.

His body started to grow in size and he started to grow a mix of purple and red fur on his body.

His hair which was supposed to be black and purple became darker as the black hair started to take over it.

"Haaaaaaaa." He yelled out as he swiped his hand creating a massive guest that almost sent Buu, Bra and Kibito flying away.

"I was not expecting this to work. Since there is no Blutz wave to absorb and Trunks does not have a tail."

"Good thing I tired anyway. It seems Fusion dance works mysteriously." Gotenks said as he looked at Buu.

Gotenks moved so fast as he appeared behind Buu.

It was so fast to the point that Buu who had no trouble keeping up with Super Saiyan 3 Goku didn't even have time to use instant transmission to get away.

Buu was launched flying into space with just one hit.

Gotenks pointed his finger in the direction where Buu went and made a circular motion.

"Galatic Donut." He said.

A yellow ki circle appeared around Buu as it wrapped around his body while he was still in space.

Gotenks pointed his finger down as Buu was pulled down from space to Earth by the yellow ki ring.

He then squishes his hands which causes a small explosion that burns Buu's body just like Vegeta's true final flash.

Gotenks then moved towards Buu he immediately appeared near him as if he was using the instant transmission.

"You... How are you..." Buu wanted to ask why Gotenks was that powerful but before he could Gotenks grabbed him by the antenna and threw him away.

Only to appear before him and hit him in the face with the back of his hand, kick him away and appear back as he kicks him in the face while doing a backflip.

"This is getting still," Gotenks said.

He knew that Buu would not be able to match him no matter what he did.

And he was effortlessly beating Buu up.

But the more he overwhelms Buu the more he feels like he is cheating as he would not be able to beat Buu as Goten and Trunks since they are not strong enough.

"Time to end this. Once in for all." Gotenks said as he created a rainbow colour orb in his hands.

"I want my brother to survive. So I hope this will work. Well if it doesn't work we can just wish back your brother using dragon balls." Gotenks said as he crushed the rainbow colour orb and threw the dust that appeared at Majin Buu.

"Take this. Stardust Breaker." Gotenks said.

"Please. Stop. I beg of You. I will help you restore everything to the way it was. We still have the dragon balls. Right?" Buu who was beaten up one sidely tried to beg for his life in his last moments.

But it was too late as his whole body was turned into Glitter when the rainbow dust hit him.

Gotenks immediately defuses as soon as Buu is defeated.

Gohan's body was used as a core by Buu so it remained after Buu was destroyed by Gotenks as he lay motionless on the ground.

Fat Buu also remained as he lay on the ground.

As wicked and cruel as Buu was he still had an innocent side that could be used the save the world in the future.

The battle between Gotenks and Buu has finished with Buu's death.