This idea has been in my head for a while, and I figured this might be a good place to put down the stories inside my head.
A few weeks after the Cell Games, Vegeta is at Capsule Corporation. He is still despondent after the death of his longtime rival. Without Kakarot, the urge to train is diminished. He still does so, but spends more and more time trying to figure out how to be a father. That is until Gohan walks in. Gohan is in Super Saiyan form, retaining his ability to stay in the transformed state indefinitely.
“What are you doing here?” Vegeta is incensed simply by the boy’s presence. It reminds him of the man he will never get to beat.
“I respect my father’s decision,” Gohan’s tone was respectful, but determined. “But he was wrong. His absence does not protect the Earth from danger. There will be new threats. If I want to be ready, I need to be stronger.” He locked eyes with Vegeta. “I need to embrace my heritage. I want to train with the rightful King of the Saiyans.”
Vegeta's eyes widened. His heart raced. All the old feelings returned. He had a new future. He smiled his vicious smile. “Prepare for punishment. I will make an elite Saiyan warrior out of you.”
Years pass. Gohan spends most of his time at Capsule Corp, training constantly. He spends an hour a day with Bulma being tutored to satiate Chi-Chi, who eventually visits as well, after Goten and Trunks have joined Vegeta and Gohan’s training. Because of this, all four of them become immensely powerful. All three boys have also learned under Bulma’s tutelage, keeping up their intelligence.
At Chi-Chi’s insistence, Gohan enrolls in Orange Star High School as he does in the anime. Day 1 starts as it does in DBZ proper. Gohan runs into bank robbers, goes Super Saiyan, and dispatches them easily. He returns to normal and goes to school. All goes well until Videl questions him. “The Gold Fighter was wearing a white shirt, a black vest, and red pants.”
“But he had gold hair.” Erasa chimed in.
“Like this?” Bolstered by the Saiyan pride fostered by Vegeta, Gohan transforms right there in the classroom, and brings the world to a halt. Gohan, the Gold Fighter is immediately a household name. It quickly comes out that he is the son of former World Martial Arts Champion Son Goku, and Videl steps in to help him handle the publicity... On the condition that he train her.
The next day, Videl arrives at Capsule Corp. Vegeta refuses to train her, so he focuses his attention on Goten and Trunks, who are decked in Bulma’s rendition of Saiyan armor. Gohan trains Videl, and within a day she learns the basics of ki control. The next day, she has taken to the air, if only barely. Suitably impressed, Vegeta steps in.
“Who are you?” He asked incredulously. “Very few earthlings are this naturally adept.”
Videl stood strong. “I’m the daughter of Mr. Satan, the World Martial Arts Champion!”
Vegeta stared, confused, before a sudden spark of realization hit him, and he burst into laughter. “That oaf? He’s about as strong as an Arlian beetle!”
“I know him!” Goten chimed in. “He’s the strongest guy on Earth not like us!”
Vegeta looked angry. “Then he isn’t strong.”
Videl mirrored his rage. “It’s his training that made me this good. If he learned this stuff he could outclass you!”
Vegeta laughed once more before regaining his poise. “I very much doubt that, girl. But you have potential. Keep it up and you could find yourself among Earth’s ACTUAL warriors. I will train you.”
Videl’s first instinct is to refuse, but seeing Goten and Trunks flying and firing blasts, throwing punches and kicks way above her head convinces her that she wants that power.
3 days into Vegeta’s training, Videl is almost destroyed, but feeling incredibly strong. Feeling bold, Gohan helps her up and wipes her hair from her face.
“You’ve come so far, Videl. I’m impressed!” Gohan smiled. “But you should consider cutting your hair.”
“You like girls with short hair?” Videl stared into Gohan’s eyes.
“Uh, I don’t know.” Gohan was stupefied. “But as a fighter your hair is just getting in the way.”
“And those pigtails make free weapons for your enemy.” Vegeta chided without looking.”
“WHAT’S IT MATTER TO YOU?” Videl yells before angrily leaving and flying off, not even realizing this was the first time she flew home on her own.
The next day the Saiyans were surprised to see Videl show up with the pixie-cut.
“Who’s the new boy?” Goten energetically blurted out.
Videl ignored him. “I have an idea!” All eyebrows quirked. “We should all enter the Tenkaichi Budokai!”
“The what?” Vegeta was already agitated.
“It’s the tournament my dad one decades ago.” Gohan replied.
“Videl’s dad won the last tournament, but that was before I was born.” Goten added.
“And why should we enter?” Vegeta scoffed.
“For one, first prize is 100 million Zeni.” Videl quickly added.
“My wife is heir to the biggest fortune on the planet. I don’t need money.”
“More importantly, I need someone to knock my dad off his high horse.”
Vegeta smiled. “That’s almost worth it.”
Videl got angry. “Come on! What will it take?”
“What if I join in?” A familiar voice echoed through the room.
Goten, Trunks, and Videl looked around confused as Vegeta and Gohan looked with sudden hope and excitement.
“It turns out that due to my heroic efforts in life, I've earned a bit of credit! I can spend a full day on Earth. I think I’ll use it to fight in the tournament!”
“At last! I can prove that I have surpassed you!” Vegeta shouted with glee.
Goku laughed. “You can try.”
Fast-forward to the tournament. Pretty much everything proceeds as normal, with a few changes. First, Gohan enters under his real name. Second, Tien enters the tournament as well, eliminating Mighty Mask from reaching the final 16. Third, as Gohan’s abilities are public knowledge, and speculation about his presence at the Cell Games has already started, the no-Super Saiyan rule isn’t instituted among the Z fighters.
Goten and Trunks dominate the Junior Division, and meet up in the finals. But this time, Trunks’ hubris gets the better of him, and Goten is victorious. In the exhibition, Goten takes to Mr. Satan’s antics, and hits him softly. Mr. Satan plays it up(although it did really hurt), and the “Let Goten win” narrative holds true.
The main tournament begins proper, and the 1st round looks like this:
Krillin Vs Pintar
Ma Jr(Piccolo) Vs Shin
Videl Vs Spopovitch
Gohan Vs Kibito
Vegeta Vs Goku
Tien Vs Yamu
18 Vs Jewel
Mr. Satan Vs Killa
Krillin eliminated Pintar with a single kick.
Piccolo again discovers Shin’s identity as the Supreme Kai, but at Gohan’s insistence goes through with the fight. It is an intense battle, but in the end Shin uses speed and tactics to outplay Piccolo and overpower him, winning by ringout.
Videl beats down Spopovitch, and once again kicks hard enough to spin his head around. He returns his head to proper position, then assaults Videl mercilessly. However, under Vegeta’s tutelage, Videl has grown smarter and tougher. A surprise energy blast blinds Spopovitch, and a swift kick gives Videl the win by ringout. She is still heavily hurt, and Goku retrieves Senzu Beans to help her out. Spopovitch almost attacks in rage, but Yamu reminds him of their mission.
Kibito once again asks to see Gohan’s power. Gohan goes full power Super Saiyan 2, then Yamu and Spopovitch attack. However, this time, Gohan overpowers Supreme Kai’s hold, and easily knocks away his attackers. Yamu is disqualified, but it doesn’t matter. Enraged at their failure, Babidi blows up their heads from afar. Kibito, unsure of how to proceed, forfeits the match.
After an intermission due to mysterious cranial combustions, Vegeta battles Goku. This battle is by far the most exciting of the 1st round. Vegeta and Goku both battle at full power Super Saiyan 2, shaking the very earth beneath them. Eventually, Goku uses Instant Transmission, which Vegeta specifically trained for. He counters the move, and drives Goku into the ground for a ringout. Vegeta is victorious.
Tien advances automatically due to Yamu’s disqualification and subsequent death.
18 eliminates Jewel with ease.
Mr. Satan, though rusty from lack of training, overpowers Killa and wins a hard-fought victory.
Between rounds, Supreme Kai explains what happened with Yamu and Spopovitch, about the wizard Babidi and their purpose here. Goku, hopeful for more fights, says he’ll go, but Vegeta convinces them to let the tournament play out first, as he doesn’t want to miss the opportunity to face Gohan, who he now views as Kakarot’s(and possibly his) superior.
Round Two begins.
Krillin faces the Supreme Kai, and although he puts up a decent fight, Shin defeats him handily.
Videl goes all-out against Gohan. He pulls his punches and avoids direct attacks, enraging her. Her ferocity is eventually enough to force him to go Super Saiyan, and he throws her out as gently as he can.
Tien battles Vegeta, and is enough to force Vegeta to Super Saiyan 2, where he easily beats Tien unconscious.
Before the final match of the 2nd round, 18 corners Mr. Satan. She reminds him that he’s screwed, period. She makes him an offer. She can make him look good in defeat for 50,000,000 Zeni, or she’ll throw the match for 100,000,000 Zeni. Mr. Satan, not wanting to face Vegeta, chooses the first. 18 fakes great effort, but knocks Mr. Satan out of the ring. The crowd immediately assumes he would rather give up his title than hit a woman, protecting his reputation.
Supreme Kai challenges Gohan in the Semi-Finals, and puts him through paces. However, he is no match for Gohan at Super Saiyan 2, and Gohan is victorious.
Vegeta, upon seeing 18 across the ring, remembers the humiliation she put him through in the Android Saga, and immediately assaults at Super Saiyan 2. 18 only holds out for a few minutes before Vegeta begins a vicious beatdown. He relentlessly hits her, years of aggression unleashed, to the dismay and boos of the crowd. Krillin screams for him to stop. Vegeta looks to mock him, but sees Gohan, his final opponent. He tosses 18 out of the ring, mercifully ending the fight.
There’s a short intermission as anticipation builds for the final match. People throughout the world are tuning in for the fight of the century. When the fight begins, Vegeta and Gohan both start at Full Power Super Saiyan 2. The fight is so intense most people have trouble following. Slow-Motion cameras are brought in just to capture clips of the battle. Things escalate when Vegeta attempts a Galick Gun, which becomes a full-on beam struggle as Gohan counters with a Masenko. Vegeta appears to have the advantage, pressing down on Gohan, until Gohan starts to transform. Vegeta abandons the struggle as Gohan goes Super Saiyan 3. Vegeta mocks Gohan, claiming him to be desperate. Gohan counters by telling Vegeta he already lost. Gohan transformed first, and he won’t give Vegeta the chance. Vegeta instantly realizes his error. He tries to go Super Saiyan 3, but Gohan eliminates him before he can do so.
Gohan wins the Tenkaichi Budokai.
Gohan accepts the title, but refers everything else to Chi-Chi, who is ecstatic. Goku locates Babidi’s hideout via Instant Transmission, and Goku, Vegeta, Gohan, Krillin, Piccolo, Tien, 18, Videl, Kibito, and Shin warp to that location, with Goten and Trunks grabbing on at the last second to come along.
The door to Babidi’s hideout was open. Supreme Kai warns them of the obvious trap, but the team doesn’t care, and steps right in. Piccolo and Krillin protest Trunks and Goten coming along, but Vegeta intercedes.
“The boys are stronger than either of you. If you can go, they can go.”
They enter the hideout, and Pui Pui welcomes them. He explains the 3 fighters before Babidi system.at the Z Fighters have to beat 3 fighters on 3 levels to get to Babidi. Trunks aggressively steps forward to fight Pui Pui. They are transported to Pui Pui’s home, thinking the gravity(10 times that of Earth) gives him the advantage. However, under Vegeta’s tutelage Trunks has dealt with several hundred times Earth’s gravity, and quickly dispatches Pui Pui with the Galick Gun.
Goku gets the opportunity to fight Yakon, and defeats him by going Super Saiyan 2. Yakon eats so much light energy he explodes.
The final warrior is Dabura, and Gohan goes against him. At Super Saiyan 2 Gohan is easily outclassing Dabura, and Babidi is terrified that his plan is failing and he’ll be wiped out. He desperately urges Dabura to do something. Thinking quickly, Dabura turns and spits on Videl, turning her to stone. Gohan breaks down, and goes full rage mode, transforming to Super Saiyan 3. With an instantaneous strike, he decapitates Dabura.
In this moment, Babidi sees his chance, and enters Gohan’s mind. He latches on to Gohan’s rage and tries to awaken the darkness within him. Gohan fights and resists, but Babidi sees an opportunity in Gohan’s mind. Using his magic, he regrows Gohan’s tail and shows him a full moon. The entire team is terrified as they have to fight the most powerful force they have ever seen...
Majin Golden Great Ape Gohan.
The raging Golden Oozaru levels mountains and knocks the Z Fighters around effortlessly. Babidi woops in victory as his power needed to revive Majin Buu goes from zero to full instantly.
Trunks and Goten go Super Saiyan 2, Piccolo, Tien, Shin, Kibito, and Krillin charge up to full power, and Vegeta and Goku go Super Saiyan 3, and they are still barely holding on. They barely notice Majin Buu’s awakening, as they are relentlessly beat down. All seems lost until Vegeta sees Videl awakening from her petrification.
“Kakarot! The girl!”
Goku looks confused until he also sees Videl. He quickly grabs her and carries her up. Explaining the situation as best he can, he tells Videl she is the only one can reach him.
Videl calls out to Gohan, and does get his attention. After some loving words, and finally recognizing that she is okay, Gohan regains control.... and starts to transform.
His eyes go yellow, his hair grows long and red fur adorns his chest.
Gohan has gone Super Saiyan 4.
Everyone stands in awe of Gohan’s overwhelming power.
The team moves on to face Babidi, who transports everyone out of the hideout. He boasts about the awakening of Majin Buu, who looks around happily and yawns. Babidi commands Buu to destroy the Z Fighters, and Gohan obliterates Buu with a single ki blast. Babidi is shocked and scared frozen. Piccolo moves forward and chops Babidi in half. In his final breaths, Babidi pleads for mercy.
“Where was mercy when Buu was unleashed upon the galaxy?” Shin spat through gritted teeth. “Where was mercy when he slaughtered my fellow Kais?”
“Please... That was my father’s doing....”
“And you sought to set him loose on the universe once more. You give no mercy, and you shall receive none.”
And Shin annihilates Babidi.
Then, to everyone’s surprise, Buu reforms in front of everyone, and seems unfazed by the previous event.
“You strong! You play with Buu some more?” Buu’s stomach rumbles. “Buu Hungry!”
After much deliberation, Goku convinces the team that Buu might not be a threat so long as he is satiated. However, he burned most of his remaining time, and leaves to spend the rest of it with Chi-Chi and Goten. The rest take Buu to Capsule Corp for a post-tournament/post-saving the world feast.