Dr. Gero

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Dr. Gero as Android 20.

Dr. Gero is a male character that features in Dragon Ball.



Dr. Gero was originally one of the chief scientists of the Red Ribbon Army. He swore revenge on the young hero Goku after he singlehandedly destroyed Red Ribbon, and spent the following decades creating the perfect weapons to destroy him. Gero's initial plans involved the creation of androids. However, his plans adjusted after Goku's battle against Piccolo at the World Martial Arts Tournament. Gero decided that he would need the ultimate warrior to defeat Goku, and took cell samples over the years of Goku, Piccolo, Vegeta, Nappa, Gohan, Frieza and King Cold (and probably Tien, Krillin and Yamcha as well). Gero planned to combine and improve upon the cells for his creation.

In the meantime, he continued to focus on machines, culminating in the powerful Android 16. After 16, he pursued another avenue, creating a pair of androids from a pair of human twins- Android 17 and Android 18. However, the twins were dangerously rebellious, so Gero placed them in stasis. Instead, he planned for them to become the means by which his ultimate warrior- later known as Cell- would ascend to his perfect state, by absorbing them.

Gero's next experiments were on himself. Creating Android 19, he used it transfer his brain to an android body, Android 20. Equipping himself and 19 with energy-absorption devices, he felt he was ready to destroy Goku. However, Goku and friends had been warned about Gero's plans by Trunks. When Gero unleashed his attack near South City, the Z Warriors were ready to face them. Despite that, 19 and Gero were able to nearly kill Yamcha and Goku, until Vegeta- now a Super Saiyan- came onto the scene. 19 was destroyed, and Gero retreated to his lab, deciding that he could force 17 and 18 to defend him. Unfortunately for him, they decided instead to kill him instead- 17 beheaded him and crushed his brain.


Personality and attributes

Powers and abilities


  • It's unclear whether Gero intended to make 17 and 18 part of Cell all along, or if he incorporated 17 and 18 into his plans for Cell after they rebelled.

Alternate Versions

  • In the alternate future of Trunks timeline, Gero survived longer, only being slain by 17 and 18 after he revealed Cell to them.
  • In Dragon Ball GT, Dr. Gero appeared in the setting during the Super 17 Saga. After ending up in Hell (HFIL), he eventually met and joined forces with Dr. Myuu to create Artificial 17, who used the real 17 to open a portal to Earth. Artificial 17 then combined with the real 17 to form Super 17. Myuu, however, no longer had any need for his partner, and had Super 17 destroy Gero once again.

In other media


  • In Dragon Ball Z: Super Android 13!, he was referenced and seen in flashbacks in the animated film. It was shown he had constructed earlier android prototypes with these including Android 13, Android 14 and Android 15. Afterwards, the computer in his laboratory released these models and sent them with a singular command of killing Goku.

Video games

  • In Dragon Ball FighterZ, Dr. Gero was referenced in the setting of the fighting video game. He was shown to had a wife where they had a son together with Gero later converting her into a cyborg known as Android 21 who was the primary antagonist in the setting.


  • Dragon Ball Z:
  • Dragon Ball GT:
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