Originally built as a Battle-SIMulation-Bot for alien soldiers, SIM was hidden in the cargo hold of an alien spacecraft. When military investigators found SIM, they accidentally activated its seek and destroy function sending SIM into the Glome on a predatory mission to eradicate alien beings. If SIM is successfully deactivated or destroyed, it will go into hibernation mode to repair and restore for its next round of battle training simulation. SIM eats metal which is then broken down into the building material for regeneration.
Did You Know: SIM was programmed to defend children, so SIM will protect and aid any being or creature that it takes (or mistakes) for being a child. SIM is Grumbl...