Editing Dr. Gero (section)

==== Androids/Cell Saga ====
Two years after the destruction of Namek, [[Future Trunks]] arrives and informs the Z Fighters that in three years, two extremely powerful Androids created by Dr. Gero will appear. On May 12 of Age 767, at 10:00 am, Android 19 and Android 20 emerge on an island nine miles southwest of South City. They attack Yajirobe in his hovercar, shortly after he delivers a sack of Senzu Beans to the Z Fighters, and then descend into the city, where they begin a ruthless killing spree. At one point, Android 20 grabs a man from his car and crushes his skull without showing any emotion.

The Z Fighters struggle to locate the Androids due to their lack of detectable ki, but [[Yamcha]] is the first to find them after hearing a woman's scream. Mistaking them for civilians, Yamcha approaches them and warns them to evacuate, but he soon notices the Red Ribbon logo on Android 20's cap. Android 20 smugly confirms that they are indeed the Androids Yamcha is referring to.

Before Yamcha can react, Android 20 demonstrates a deadly power—an energy-absorbing function that Dr. Gero designed for the Androids. Using a small red jewel embedded in his hand, Android 20 grabs Yamcha by the jaw, punches a hole through his chest, and drains his life force. Goku, Piccolo, [[Krillin]], and Tien Shinhan sense Yamcha's rapidly decreasing energy and rush to find him gravely injured by Android 20. Krillin quickly takes the dying Yamcha back to [[Bulma]] to receive a Senzu Bean.

Android 20 is surprised that the Z Fighters knew they were Androids and appeared in anticipation of their arrival, despite the Androids giving no indication of their presence. He questions how the Z Fighters knew this, but Piccolo refuses to answer, stating that they will have to obtain the information by force. Android 20 coldly replies that they will do just that.

Goku, concerned about the safety of innocent people, suggests moving the battle to another location. Android 20 misinterprets this as Goku not wanting anyone to interfere and destroys half of the city and its populace with his Bionic Punisher. Enraged, Goku charges at Android 20, delivering a punch that knocks off his hat, revealing a seemingly organic brain underneath. Android 20 detects Goku's dissatisfaction with his solution to finding an uninhabited place and tells Goku to choose the location of his death, calling him by name.

Piccolo, surprised, wonders how Android 20 knows Goku's name. Android 20 calmly reveals that he knows all of them, mentioning Piccolo and Tien by name as well. As police sirens approach, Goku says that they can ask questions later and takes off, with the Androids, Piccolo, and Tien following him.

As the group flies over a deserted plain, Android 20 suggests that they fight there, deeming it an adequate battleground. Goku does not object, and the group lands. Piccolo notes that the plain is surrounded by rocky mountains, suspecting that the Androids plan to use the terrain for hiding if necessary. Android 20 begins to explain that they have been monitoring Goku's battles with miniature surveillance drones since he defeated the Red Ribbon Army, searching for any weaknesses. He mentions that only the humiliated Dr. Gero remained after the Army's defeat, prompting Piccolo to remark that 20 is speaking as if he were Dr. Gero himself. Android 20 lies, claiming he is Dr. Gero's creation and that the doctor is no longer alive.

When Goku asks if they observed his battles on Planet Namek, Android 20 replies that by that time, they had sufficient data and did not need to continue monitoring him. The Androids' power levels had been adjusted to account for Goku's expected power increase. Goku, however, tells Android 20 that he missed something crucial. Surprised, both Android 20 and 19 listen as Piccolo reveals that their fatal mistake was not knowing about the Super Saiyan form. Goku then powers up and transforms into a Super Saiyan, his burst of ki alerting Gohan, Krillin, and Yamcha to the battle's location. Android 20 acknowledges that Goku has far exceeded their calculations but insists that 19 can still handle him. Goku, confident, decides to find out for himself and charges into battle.

At first, Goku dominates the fight, overwhelming Android 19. Android 20 becomes concerned that 19 will run out of energy before he can absorb any of Goku's power. Just then, the Saiyan Heart Virus begins to take its toll on Goku, weakening him significantly. Despite his exhaustion, Goku attempts to finish Android 19 with a Kamehameha. To the Androids' delight, 19 absorbs the blast with his right hand, increasing his power while Goku's energy plummets. Krillin gives Goku a Senzu Bean, hoping it will help him recover. Recognizing the bean, Android 20 realizes it is the legendary Senzu, and Yamcha regains some optimism about Goku's chances. However, the Senzu Bean cannot cure Goku's illness, and he loses his ability to maintain his Super Saiyan form.

Android 19 takes advantage, leaping onto Goku's chest and grabbing him by the neck to drain his energy. The rest of the Z Fighters rush forward to help, but Android 20 intercepts them, warning that they will not interfere and daring them to try at their own peril. Piccolo boldly charges at Android 20 but is struck down by 20's Eye Lasers, causing him to fall to the ground. Android 20 mocks Piccolo's actions as bold but foolish. Just as Goku is about to be overwhelmed, Vegeta intervenes, saving him by delivering a powerful kick to 19's face and declaring that he will be the one to end Goku.

The sudden arrival of Vegeta leaves both the Z Fighters and the Androids stunned. Piccolo, who had been lying on the ground, suddenly gets up, revealing that he had been faking defeat to catch the Android off guard. He reassures Gohan that it would take more than one blast to beat him. Vegeta, having observed everything, criticizes Goku for turning into a Super Saiyan despite noticing the anomaly in his body, then kicks him into the air. Piccolo catches Goku, and Vegeta suggests that someone should take Goku home and give him the Heart Medicine. Yamcha volunteers, acknowledging his limited usefulness in the fight. Piccolo advises Yamcha to take some medicine himself, in case the virus is contagious. As Yamcha flies off with Goku, Android 19 prepares to give chase, but Android 20 stops him, suggesting that they save Goku for last and focus on the other Z Fighters now that Vegeta has joined them.

Android 19 asks if he can kill Vegeta, and Android 20 agrees, calling him greedy and stating that he will take care of the other four. Vegeta, unimpressed by the Androids' power, notes that they are not as strong as they were rumored to be. He acknowledges their energy absorption ability but warns that Saiyans cannot be reduced to mere numbers. Vegeta then transforms into a Super Saiyan, shocking both the Z Fighters and the Androids. Krillin, surprised, comments that he thought a Super Saiyan required a pure heart. Vegeta either declares that his heart is pure but purely evil or explains how he became a Super Saiyan through intense training and rage against himself. Android 20, undeterred, claims Vegeta is still no match for them, and Android 19 charges towards Vegeta.

To Android 20's horror, Vegeta brutally beats Android 19, who, terrified, tries to flee. Vegeta rises into the air and prepares to finish off Android 19 with a Big Bang Attack, despite Android 20's demand to stop. Vegeta dismisses Android 20's command, stating that he will deal with him afterward. Vegeta's attack creates a massive explosion, leaving only Android 19's head intact, stunning the onlookers. Vegeta lands near Android 20, powers down to his base form, and taunts 20, suggesting that now is his chance to defeat him. Android 20, suspicious, wonders what trick Vegeta is trying to pull. Vegeta asks why Android 20 said he had no hope, and Android 20 retorts that even though Vegeta has exceeded their calculations, he still believes he is more powerful. Vegeta challenges Android 20 to prove it. Intimidated, Android 20 chooses to flee, heading for the nearby rocks as Piccolo had feared.

Android 20 hides from the rejuvenated Super Saiyan Vegeta, watching him from a distance. Growing impatient, Vegeta attempts to flush 20 out by destroying the surrounding area, launching a Photon Bomber toward the ground. Krillin warns Vegeta to stop, fearing that the rest of the team could be caught in the blast. Seizing the opportunity, Android 20 absorbs the energy from the blast through his palms. Vegeta immediately pursues Android 20, but 20 quickly disappears. Frustrated, Vegeta realizes that Android 20 is faster than he anticipated and has managed to evade him. Watching from above, Android 20 criticizes Vegeta for relying too much on tracking ki, noting that he has lost his ability to track movement. Despite acknowledging Vegeta's power, Android 20 is reluctant to return to his lab and instead decides to steal energy from Gohan, Tien, Piccolo, and Krillin, who are searching for him, to become powerful enough to defeat Vegeta.

Android 20, recognizing Piccolo as the strongest after Vegeta, decides to attack him first. He ambushes Piccolo from behind, covering his mouth to prevent him from calling for help, and begins to absorb his energy. 20 smugly informs Piccolo that the others cannot see them because he knows exactly where everyone is. However, Piccolo telepathically calls out to Gohan, who quickly detects the rapid decrease in Piccolo's ki and rushes to his aid. Just as Android 20 is about to drain the last of Piccolo's energy, Gohan arrives and strikes him from behind, knocking him off Piccolo and dislodging 20's hat in the process.

Sensing Gohan's ki, Krillin, Tien, and Vegeta quickly surround Android 20. Surprised by the sudden arrival of the other Z Fighters, Android 20 decides to stall for time, hoping to absorb more energy before he has to face Vegeta. Gohan instructs Krillin to give Piccolo a Senzu Bean, which he does. Revitalized, Piccolo removes his weighted clothing and steps forward to face Android 20, telling Vegeta not to interfere because he wants to handle the Android himself. Vegeta, showing indifference, warns Piccolo that he will only be giving Android 20 more energy, but ultimately allows him to fight.

Android 20, seeing an opportunity to absorb more energy from Piccolo, prepares to engage. However, Piccolo quickly disappears from his sight and delivers a powerful knee to his face. The two engage in battle, but it's clear that Piccolo is vastly superior due to his intense training with Goku over the past three years and his fusion with Nail. Piccolo ruthlessly severs Android 20's right arm, preparing to finish him off. However, he is momentarily distracted by the arrival of Future Trunks.

Realizing that he has miscalculated, Android 20 decides to retreat to his lab to activate Android 17 and Android 18. However, he knows he cannot fly away without being spotted and decides to make his escape on foot. At that moment, Bulma arrives in an airplane with Yajirobe and the infant Trunks. Seeing an opportunity, 20 fires a large Photon Wave at Bulma's plane, creating a cloud of smoke and dust to cover his tracks. Using the distraction, Android 20 escapes into the rocky mountains. Bulma, having recognized Android 20 as Dr. Gero, quickly informs the Z Fighters about the approximate location of his laboratory, prompting them to head toward the mountains near North City. Vegeta, feeling overconfident with his newfound Super Saiyan power, decides to go off on his own to challenge the Androids, while the rest of the group becomes determined to find Gero's lab before Vegeta does.

As he hides among the rocks, Dr. Gero sees Vegeta and Future Trunks flying overhead toward his lab. Initially thinking it a coincidence, he soon realizes that they are indeed heading for his lab to destroy Androids 17 and 18 before he can activate them. Gero races toward his lab, hoping to reach it before the Z Fighters. Along the way, Gero senses Krillin nearby and ambushes him. However, before he can kill Krillin, Gero senses Piccolo approaching and decides to spare him, hurrying to activate the Androids instead.

Dr. Gero quickly reaches his lab, leaping into the cave that houses it. As he is about to enter, his sensors detect something, and he turns to see Krillin watching him. Confident that Krillin will not be able to stop him, Gero opens the door to his lab and taunts Krillin, saying that even if he calls the others, they will be too late. Sensing Krillin's raised ki, Piccolo, Tien, Vegeta, and Trunks all head toward the lab, aware that time is running out.

Inside his lab, Dr. Gero prepares to activate Androids 17 and 18, expressing reluctance but acknowledging that he has no choice. He hopes that the androids will be obedient, despite his previous failures with their infinite energy reactors. Holding his Shut Down Remote, he activates Android 17, who greets him politely but eyes the remote with suspicion. Gero is relieved to see 17 operating as expected and then activates Android 18, who also shows a polite demeanor but similarly eyes the remote. She comments on Gero's transformation into an android and he explains that he desired eternal life. Gero admits that he had previously focused too much on their infinite energy reactors and disabled their behavioral limiters, leading to their uncontrollable nature.

Gero informs the androids that the Z Fighters are approaching and instructs them to kill them all. The androids agree, but as they prepare to do so, the Z Fighters arrive and begin trying to break into the lab. Distracted momentarily, Gero is horrified when Android 17 steals the remote from him. Android 17 crushes the remote, declaring that they will not be put to sleep again.

Vegeta then blasts the lab door open, and the Z Fighters confront the androids. Gero orders Android 17 and Android 18 to kill the Z Fighters, mentioning that they had destroyed Android 19 and almost killed him. Android 17 inquires if 19 was an energy absorption model and if he was the one who converted Gero into an android. Gero confirms this, and Android 18 questions if the switch to an infinite energy model was because they were too powerful to control. Gero dismisses these concerns, insisting that they should just kill the Z Fighters.

Android 18 begins inspecting a chamber labeled "16" and notices that Android 16 is also an infinite energy model. She asks how 16 differs from them, but Gero orders her to stay away from 16's chamber. Android 17 suggests activating Android 16, but Gero forbids it, calling 16 a failure that poses a risk to the world. Android 18 questions why Gero kept 16 if he was a failure, and Gero explains that he planned to fix him later. Android 17 insists that he has a higher power rating than 16 and demands that 16 be activated. Gero, enraged, threatens to deactivate all the androids, but Android 17 reminds him that the remote is destroyed. Gero says he can build another one.

As Gero continues to insist that 16 should not be activated, Android 17 abruptly ends Gero's life. His remains, along with what seems to be the rest of his laboratory, are later destroyed by Future Trunks, who fires a Buster Cannon at the lab with the intent of eliminating Androids 17 and 18.