see Biobot (enemy)
The Bio-bot is the character you play as in Zombotron 1 and leader and founder of Biobot army. The game description says more than Bio-Bot was created, but none other than the player are seen in the game (until Zombotron 2 Time machine).
The Bio-robot from Zombotron 1 was sent to the planet to destroy the zombies and other creatures that were infesting Planet Zombotron. It has red pants and shirt and a silver helmet, gloves, and shoulder pads with the visor on the helmet being red. This Bio-bot defeats the boss monster and succeeds in its mission, but as seen in the beginning of Zombotron 2, it is killed by a spaceship crashing into the planet.
The player in Zombotron 2 does not appear to be a Bio-Bot. The scientist states, "You don't look like zombie or a bio-bot." The player in Zombotron 2 is an explorer sent to search for rare minerals when shot down by the space defenses orbiting Zombotron.