Miles away from North City in the mountains nearby an Android known as Dr. Gero raced towards his lab after taking out one of the Z Fighters. It wasn't until he reached his laboratory that he realized he was followed by the same person he thought he had incapacitated. But he ignored him since Vegeta and the other fighters were about to arrive too. After punching the code to his laboratory the heavy and durable metal door opened to reveal a dark room. The moment he stepped inside his laboratory the lights turned on as the door shut behind him. He grabbed a remote from the wall that would shut down the Androids he plans to activate in case they ended up trying to disobeying him. He stood in front of two containers that housed the Androids with the designation of 17 and 18. "I'd rather not bring these two back online." He looked over to the side next to the open container that housed another Android that had the number 21 on it. "She's been more obedient than 17 and 18, although she's been acting strange recently. But with how events are unfolding I guess she's the best choice." Dr. Gero walked over to 21's container and pressed the activation button. The container's door slowly opened up to reveal a woman with spiky black hair with two strands hanging in front and she blinked to which revealed black eyes. She wore a light blue coat with the Red Ribbon Army logo on the back. Under the coat, she wore a black long sleeve shirt and gray pants with a belt and black boots. The Android climbed out of the container and stared at the remote Gero's hand before turning her attention back to the Doctor.

"Good morning, Doctor."

"Good. Android 21, listen. Goku's Allies are heading towards this laboratory as we speak. Go eliminate them! Leave none alive!"

"Understood." Android 21 looked to the side and noticed the container that housed android 19 was empty. "Dr. Gero?"

"Yes? What is it?"

"19... What happened to him?"

"He was destroyed in the battle against Vegeta. I have underestimated them and I almost lost my life due to it too."

"So, they're stronger than reports say... If that's true then I'm going to need help." Android 21 said as she started to come up with a scheme.

"What do you mean?" Dr. Gero said as he started to get suspicious since he knew Android 21 never accepted help from Android 19 before or anyone really.

"If they're as strong as I think they are. I'm going to need help. I may be a Perpetual Energy model, but I'm still outnumbered." 21 walked over to the containers for 17 and 18. "Why don't we wake up the twins?"

"No! Don't activate them! Those two are failures!" Dr. Gero warned.

"Yes, I'm aware. They never followed your orders. Didn't you say you were going to rewrite their personalities?"

"Yes! But I don't know if it worked!" All of a sudden banging started coming from the door letting Gero and 21 know that they had arrived. Since their sudden arrival forced his hand as he reluctantly agreed. "Fine! If it'll help get rid of those pests!"

Android 21 walked over to 18's container and looked through the red glass to see a female Android. "Maybe she'll be of use." She walked over to 17's container and just like with 18's, she looked through the glass to see a male android. "He could be useful."

"Hurry it up!" Gero shouted.

"I don't know what you're so worried about these two. It seems with what sensors are telling me, I'm stronger than the either of them. You know what? I'll only wake one of them. If they start disobeying, I'll definitely be able to subdue them, but it'll take some work to do so." Android 21 pressed the button to awaken Android 17 and the container slowly opened up. A man with black hair and he has an orange scarf around his neck. 17 stared at the unfamiliar Android before turning his attention to Dr. Gero.

"Good morning, Doctor. Thank you for waking me." 17 said in a rather polite tone.

"My word... Did I just hear you thank me!?" Dr. Gero said in shock.

"But of course. I owe my existence to you." 21 smirked at what she just witnessed since she knew he just faking it.

"21! Open up 18's!" 21 nodded as she walked over to 18's container and opened it as well. A blonde woman wearing a blue vest with the Red Ribbon Army logo on the back and she too greeted Dr. Gero with the same politeness as 17 if not more. "Well then, you three are going to be more than enough to take out those pests outside." The whole time they were waking up 17 and 18, the Z Fighters were trying to break down the door. Dr. Gero turned his attention to the door as he started to get confident with the three most powerful Androids beside him. 17 walked to Gero and snatched the remote out of his hand. "What do you think you're doing?! 17 give that back!" 21 smirked again as her plan started to work, she knew for a fact that these two would have rebelled the first chance they got and now that they are doing exactly as she planned 21 wanted to watch and see what they do next.

"You know, this sure looks like a switch you could use to deactivate us anytime you wanted. But you'd never do that, would you? Yeah, I don't think we'll be needing this." 17 crushed the remote in his hand and letting it fall to the floor.

"Is this some sort of joke, 17?! Well, it's not funny!"

"You're never putting us to sleep again, you stupid old bastard." Shortly after that, a bright light emanated from the door as it collapsed on the floor covering the entire room with smoke. The smoke cleared and revealed the fighters that forced Gero to awaken 17, 18 and 21.

'Man with green skin... must be Piccolo. Three eyes, he must be Tien. Short, bald head, six dots on his forehead... Krillin. And he must be the "Prince of all Saiyans". I don't know him though.' 21 thought as she stared at the man with the sword on his back.

18 ignored them and went to go check the container in the middle of the room since it had piqued her interest. She looked at the number on the container that had 16 on it. "Number 16, huh? It's another Perpetual Energy model, right? But, it's different from 17 and I and..." 18 turned to 21 for an answer.

"21."

"21, huh?" 18 smiled a little before she spoke again. "What about you? You a Perpetual Energy model too?"

"Yes, I am."

"Huh... Interesting." 18 turned her attention back to 16. "You know, now that I look at him. He's big, bigger than the three of us. It makes you wonder what else is different." 18 leaned closer to the container which made Gero nervous.

"You get away from that container! I'm warning you, 18! Step back! Don't even touch it!"

"How about that. Why don't we make his acquaintance?" 17 said as 18 chuckled a little at the idea.

"Fools! The both of you! Are you trying to destroy the planet! Is that what you want?!"

"Destroy the planet?" 21 said to herself. "Way to exaggerate old man."

"I'm not! It wasn't mere disobedience that forced me to turn 16 off! He's a dangerous failure!"

Android 17 chuckled at the Gero's exaggeration while 18 walked around the container 16's activation switch. "I'm surprised you kept him around considering how dangerous he is. It looks like you dismantled everything earlier than him."

"I intended to give him a complete overhaul! Look, if you do this! If you reactivate Android 16 now! You've doomed us all!"

"Doomed us, huh?" 17 repeated. "I think I'll be the judge of that." 17 said as his eyes flashed red as a sign that he's scanning the deactivated Android. Shortly after that, he let out an amused chuckle after what he found out. "My sensors are reporting that I'm stronger than he is. Alright fine, 18, go ahead. Open it up."

"Stop you fool!" Gero shouts in desperation. "21! You said you would subdue them if they displayed disobedience!"

"Oh, yeah. I did say that, didn't I? But, I am interested in this Android 16 though."

"Enough! I'm your master! Now, do as I say and stop them!" Gero shouted.

17 and 18 watched 21 as she stared at Gero but since they didn't know her they couldn't tell what she is thinking, and they decided kept their guard up. They all waited anxiously for 21 to respond, but all she did was sigh before speaking. "...Alright, whatever." 21 slowly walked over to the Androids while 17 took a stance waiting for her to strike. The next thing actually surprised both 17 and 18 since 21's fist was through Gero's chest. She pulled her arm out of his chest and before he could say anything 21 chopped off his head. She let out a satisfied chuckle before she walked over to the severed head to pick it up and she stared at it for a few seconds before crushing it in her hands.

"Why did you do that? I was sure you would follow his orders." 18 said.

"I've always hated Dr. Gero. I just waited for the perfect moment to do that."

"I think we'll be getting along well." 18 said.

"Alright, 18, 21. Let's open it up." 17 said.

"You're not activating another Android as long as I'm around!" They heard one of them shout, but before they could see who it was they were hit by a Ki blast which resulted in the entire laboratory been destroyed by his Ki blast which covered the area in a cloud of dust from the explosion.

"He was having trouble with these people?" 21 said.

"He was the weak Energy Absorption model." 17 said as the dust clear which revealed that all three Androids weren't harmed at all by the attack. "We better get him out of there. All of the support systems were disconnected."

18 dropped the container for Android 16 and pushed the button to activate him, they waited for the container to open up but was moving slowly. But 18 didn't have the patience for it so she just kicked it off the door to reveal a rather tall man with green armour. The Android opened his eyes before getting out of the container and he just stared off into the distance, and the Android's height easily towered over most people. "It occurred to me that I have never seen your model active before. Glad to be out and about after all those years?" 17 asked, but the question was met with silence. "Truth be known. Dr. Gero ordered us to leave you inside of there. He was yelling about how we're all doomed if you woke up again."

"So, care to fill us in?" 18 asked, and just like before they were met with silence. "What's the matter? Cat caught your tongue?"

"Or are you the strong, silent type?" 17 said. Again, they were met with silence. "Whatever. Let's go."

"Where to?" 18 asked.

"Where ever Goku is. Where else would we want to go? Dr. Gero invented you to destroy Goku same as us. Well, isn't that right?" They were finally able to get a response from the Android.

"...Correct."

"I see. Mention killing Goku and you chime in." 17 said.

"He's not a failure, he's just focused." 18 said.

"As much as I hate following Dr. Gero's orders. Us sitting around and doing nothing is driving me up the wall." They both turn to 21 who was staring at the ones who just watched them.

"You haven't said a word since the lab blowing up. What have you been doing?" 18 asked.

"I've been trying to measure their strength. I've been wondering who's the strongest is."

"What are you going to do? We're going after Goku." 17 asked.

"I'll tag along. I want to fight someone strong and I guess it's going to be Goku since they don't really look all that strong." They nodded as they all floated up before flying off to one of the destinations where they could find Goku leaving the ones who were after them behind.