Bio-Bots seem to be very organized, as they are sometimes seen using machinical traps and driving vehicles to transport goods or to attack. As the first Bio-Bot gets crushed by the player's spaceship at the beginning of Zombotron 2, Bio-Bots see him as a threat and want to destroy him.
The biobot's name is revealed in Stage 3 of Zombotron 2 and mentioned in Stage 3 of Zombotron 2: Time Machine. It is in Zombotron from the first level to the last. It is last seen on Stage 16 of Zombotron 2: Time Machine.
- Zombie: Is stronger than zombies and attacks them.
- Robot: Attacks robots and is weaker than the granade launcher.
- Skeleton: Is stronger than skeletons and attacks them.
- Friend and Player: Attacks both but is weaker than them.
- Spider: Is stronger than spiders and attacks them.
- Mutant: Is as strong as mutants and attacks them.
- Robomachine: Is weaker than a Robomachine and doesn't attack it. They try to go past it but get killed.
- Boss Monster: Is weaker than a Boss Monster but never interacts with it .
They are the forth of fifth strongest in Zombotron 2: Time Machine.