Android 22 (Zeon1)

Android 22 is the first and only Android created by Dr. Bronze. He is designed to be the "Ultimate Android", able to analyze his enemies and change his stats at will. He appears in Dragon Ball SN.

Early Life
22 was created by Dr. Bronze in the hope of destroying Dr. Gero's lab, but when the Doctor met his end, he was deconstructed and put in storage. When Dr. Bronze heard of Goku's return to Earth, he rebuilt 22, and sent him out to fight Goku.

Perfect Android
When Goku unveiled his Super Saiyan 4 transformation, 22 calculated that he could not raise his stats to match in his current form. So, he reshaped his body into a slightly larger and changed form, to allow him to boost his power to equal that of a Super Saiyan 4. He dubs this his "Perfect Android" form.