Ratticator

The Ratticator is the fabled vigilante hero of The Sims 2. Knowing the ancient arts of Sim-fu, the player is able to apprehend the towns most devious enemies and stop them in their tracks. Sims, Aliens and the goons(Jimmy "the Neck" and Crime Spree Bob) will be afraid of the Ratticator. Enemies will flee by either flying, being beamed up, escaping on a helicopter and fleeing in a trolley. The Ratticator is a crucial part to the end of the game as he will be needed to take down Optimum Alfred and the robots. If the Rat Cave is not bought before the final stage, Tristan Legend will be in the basement next to the locker looking door and tell you about the hero. After, you will be able to use him.

Robots and the players sanity is the only thing that can truly take out the Ratticator.