A couple hours after the battle

Everyone got together at Kame House to discuss the strategy. With Raditz explaining the incoming threat, the past hour when he threatened his own brother was forgotten.

"So Raditz" Krillin started, "why don't you start by telling what's in for us?"

"Very well. There are two of them: Nappa, a big, muscled Saiyan. His power was at 5.000 last time I checked. He's slow and only attacks head-on but he gained the title of General of the Saiyan army because of his enormous stamina and resistance to hits. My suggestion? Hit him fast, and hard. The harder the better" Raditz begun his explanation. All the other fighters were paying much attention.

"What about the other one?" Yamcha asked.

"Vegeta…" Raditz shrugged. "He's the Prince of Saiyans. When I last checked his power it was at 22.000. I really don't know how to defeat him. He is too prideful for his own good, but we are too weak to capitalize that flaw…"

"What if we wish Goku and his father back to life and train all together?" Tien suggested. "You said your father was the strongest Saiyan before the planet explosion. If he trained us, surely we would improve a lot."

"I'm afraid that's not possible" the voice of Kami echoed through their minds "Goku and Bardock are currently in Otherworld and they will go to King Kai to receive special training. They wish to be brought back to life 2 days before the Saiyan invasion. However, I suggest that Krillin, Tien, Yamcha and Chiaotsu to train at the Lookout with me"

"Hey, Uncle Raditz" Gohan spoke and everyone looked at him. Raditz himself looked surprised when the child addressed him as 'uncle'. "If I'm half-Saiyan, you think I could train with you? You said Saiyans have a unique way of training. I'd like to help you get stronger and to control my hidden power."

"Sorry, kid. Altough it is a great idea, you wouldn't survive Saiyan training until you have control of the power you have swelled up inside you"

"Leave that to me" Piccolo was hearing outside of Kame House and spoke for the first time. "I can draw out his potential"

Chichi was about to argue since she still saw Piccolo as her husband's mortal enemy. But Gohan immediately got up with a determined look and went to Piccolo "I'll train with you for 6 months and the other 6 months with Uncle Raditz. Lead the way, Mr. Piccolo" and with that they took off.

"My baby… He's so grown up…" And with a tear of joy she turned to Raditz. "Please, don't make him fight unless it's really necessary"

"I can't promise you that. The kid wants to protect the planet. Although you have my word as a Saiyan warrior I'll do whatever it takes to protect him. After all, he's my only remaining family" Raditz answered and turned to the remaining Z-fighters. "I want to go with you to Kami's. He can teach me to sense energy"

"Hey, about that" Bulma asked "Could you lend me that scouter of yours? It would be easier for us if we had a copy to know what's happening in the battle"

"You can do it? Knock yourself out. If possible, build a gravity chamber. Our home planet had 10X Earth's gravity so you all need to train at least at 5X in order to better prepare. Use those weighted clothes as well while inside the chamber" Raditz asked the Brief's heir.

"I'll have it ready in about 2 weeks."

"Now that we're settled, lets all go to Kami's" Krillin got up and the group of fighters flew away

Meanwhile in Otherworld…

"So this is Snake Way? It's huge! Well, we better get going, Father" Goku said.

"Wait Kakarrot. Let's use the trip to train. From what you told me, you're not used to flying. It should be something natural for you, so what we'll do is simple: you'll fly while carrying me. The extra weight will help you more. We'll switch whenever you're tired, but I expect you to do most of the way yourself, okay? Bardock suggested.

Goku sighed but agreed. They started their journey, wondering how the great King Kai would be training them and Bardock took advantage of the moment with his son to teach him about Saiyan history and culture.

"So… you think we should remove your tail? I mean if that Vegeta guy knows the Power Ball technique you'd be under its effect right?"

"Oh I'm sure he knows how to do it. Saiyans are not confortable to the idea of losing their tails, it would feel like they are renouncing what makes them Saiyans… I'm sorry for the selfish reason, but I don't want it. What I suggest is that when he's creating the Power Ball, one of us attacks him. It takes time and life energy to create it, so he'll weaken. I'm sure Vegeta will only use it as a last resort" Bardock explained

"Well, I'm sure we'll be able to handle it"

On Kami's Lookout

After a week meditating, Raditz was finally getting the hang of sensing and measuring ki by himself.

"Well done Raditz. Keep practicing and it will become natural to you" Kami said.

"The only downside is that I can't put an actual number. But it's easier to see if someone is suppressing power or not"

"Now, I'd like you to do something for me. In two months, I'll send the others to the Pendulum Room, where the past, present and future combine. I'll send them to fight some Saiyans from the past and I'd like you to go as well in order to check on your own progress. Only your minds will be gone, but be sure to hide that detail from them"

"Consider it done, Kami" and the Saiyan went to the Earthlings. "If you want me to train you you have to be ready! Saiyans don't really know when to stop, and you really need to come at me with your full power. I'll be holding back, seeing as I could beat all 4 of you and the green man together without breaking a sweat. So if you think you're ready, come at me!"

In a wasteland…

"HYAH!" Gohan shouted as a ki wave destroyed a mountain.

"Hmmm, not that bad, I see your father has been training you. Maybe you can be if use" Piccolo stated. "Listen, in order to bring out your potential, we'll fight all the time. Only breaks are for eating and sleeping. Are you ready?"

"Yes, Mr. Piccolo! Here I go!"

And the training begins! Will our heroes be ready in time? How will the traning in Otherworld be for the father-son duo?

Also, don't forget to review and follow if you like my story. Any tip is welcome

PLs:

Goku: 650

Bardock: 10.000

Raditz: 1.800

Gohan: 350

Piccolo: 520

Krillin: 300

Yamcha: 320

Tien: 375

Chiaotsu: 290