As the group flew, each of the kids resting on the back of one of the Z Fighters, they had conversations between themselves. Phineas and Goku were the chattiest of the group easily.
"So, how did you turn your hair all blonde like that?"
"Oh, that? That's called a Super Saiyan 3. It's the highest level of Saiyan power. See, this..." His hair shot up into a point and turned gold. "This is a Super Saiyan 1, and this..." One lock of his hair pointed down and electricity crackled across his skin. "This is a Super Saiyan 2. In each form, I get consecutively stronger." Phineas nodded, completely oblivious to the looks they were getting from all the other members of the group. Vegeta was rolling his eyes in annoyance while Buford up on his back stared in awe.
Candace, on the other hand, was staring in shock at Goku. "Wait, you can turn blonde just like that?" Goku looked back for a moment.
"Well...Yeah. I couldn't always do that, though. In order for me to do it the first time, Krillin had to die." The whole group looked back over their shoulders at the shorter fighter, who was holding his face in his palm.
"Don't remind me." Phineas glanced over at his brother.
"Hey, Ferb! I think I know what we're going to do tomorrow!" His step-brother held up a thumb in agreement. "Speaking of which, is that your ship down there with the jetpack running away from it?"
Down below, Perry couldn't believe his eyes. There they were, seven alien life forms with his friends and family settled firmly on their backs. Luckily, the jetpack shielded him from their line of sight, but having them here would be a serious impediment.
"Yeah, that's the one. Let me land right quick." They all started on a downward course, landing lightly on the ground and dropping off the kids. Goku pressed two fingers to his forehead and disappeared, reappearing a few seconds later with a tan sack in his hand. "Here we go, fresh Senzu beans. If this android's as strong as he's supposed to be, we might need these."
Perry had already landed, throwing the jetpack off and stowing his fedora...somewhere. He waddled up to the group, purring in appreciation.
"Oh, there you are, Perry." Vegeta shot the group an odd look.
"Why do have a platypus with a power level five times higher than the average human?" Phineas glanced back, clearly confused.
"I think you might be a bit off. He's a platypus for sure, but that power level doesn't quite sound right. After all, they don't do much." There was an awkward silence until an unknown voice rang out across the field.
"Challenge sighted." They whipped around, seeing none other than the Doof-Bot. It smashed into the ground, focusing each of the Z Fighters in it's sights. Goku drew himself up to his full height.
"I guess you're the android we came for. My name is Goku."
"Primary challenge located. Commencing detainment." It charged him, throwing a fist straight at his midsection. Goku stuck out a hand, catching the robot's arm. They both skidded back about twenty yards, the metal in the bot's arm groaning under the strain. Phineas nudged Piccolo's thigh.
"Shouldn't you guys be helping him out?" Piccolo shook his head.
"Not yet. Goku is the strongest fighter among us, and if he wants a good fight he'll make his opponent give him one. Trust me, this is still a warmup for him."
As they slowed to a halt, Goku's hair stood on end and turned gold. "Now, shall we?" He swung a leg at the android, connecting perfectly with it's neck. The bot spun out of control, sliding across the ground. It leapt up, attacking again, but this time when Goku aimed a downward strike at it's shoulder, it dodged out of the way, leaping up and throwing a fist at him again. He blocked, throwing it's body upward. He leapt up, following it by just a few feet.
Vegeta raised an eyebrow as his eyes flicked back and forth on the battlefield. Candace gulped as she approached him. "So, can you actually see what's going on?" He nodded. "Can you tell who's winning?"
"As it stands, Kakarot has the advantage for a few reasons. He's only using a small percentage of his power. That combined with the android's lack of experience puts the odds in his favor for now."
"What do you mean for now?"
"This android is displaying a unique capability I've only ever seen in Kakarot himself. It is learning as it fights. Each technique that Kakarot uses against it, it absorbs into it's own style. If Kakarot draws this fight out, I fear that the android may become more than any of us can hope to handle." Candace whipped her head back to the fight, awe spread across her face.
"Then why are you guys just standing here? Get out there and save a world!" Vegeta rolled his eyes. "Well?! GO!" He lifted into the air, grunting with annoyance. Just as Goku slipped a fist through the android's defenses and slammed it into the metallic face, Vegeta met him on the opposite side with a booted foot. The android slipped out from between them and blinked once or twice.
"New threat identified. Potential for increased threat. Increasing power output to three percent." Both Saiyans stumbled backward in shock.
"What?! How much power have you been using?" The android turned to Goku.
"Until now I have been using exactly 1.349 percent of my full power." Vegeta gritted his teeth.
"Alright, Kakarot. I hope you're ready, because it looks like the real fight has just begun."
