The Boss Monster in the first Zombotron game is pink colored. It is the most powerful enemy encountered in the first game. It is found in the last level and when defeated, gives the player a ton of coins and the game is over. The Pink Boss Monster is the leader and boss of all monsters; though it is weaker than the scientist's invention.
Two grey colored boss monsters appear in Level 10 of Zombotron 2. They have the same power and abilities as the pink one. They are the leader and boss of all monsters
- Fireball: Shoots an explosive fireball out of its mouth (deals great amount of damage)
- Stomp: Jumps up and down making items like boxes and crates shake (note that in Zombotron 1, the boss can be caught in a stomping glitch that will fill the entire cavern, given time). Stomps in Zombotron 1 are spaced out (at of minimum of) roughly 5 seconds.
- Claw attack: If the player gets close enough, the monster swipes at it with its claws (usually kills player)