Dr. Gero (Character) - Giant Bomb

Dr. Gero is a scientist that worked for the Red Ribbon Army. When Goku destroyed that organization, Gero swore revenge, and created androids to kill him.

Dr. Gero screenshots, images and pictures - Giant Bomb

Dr. Gero, Dragon Ball Wiki

Majin Buu Friends - Giant Bomb

Here's some ideas I had for season 4 characters, as well as how'd

Android 16 (Character) - Giant Bomb

Dr. Gero, Dragon Ball Wiki

Android 19 (Character) - Giant Bomb

What if Dr. Gero Wasn't a Villain?

Dragon Ball Z 2: Super Battle Characters - Giant Bomb