The Mars Brain Robot is a unit original to Metal Slug Attack. The standard Brain Robot was improved by the Professor, giving it better combat capabilities than its Invader counterpart. It first appeared in the Extra Ops titled "Signal Red" - the silver evolution by completing the Normal difficulty stages, then the gold / platinum evolutions through the reward chart. When the Mars Brain Robot and a Ring Laser Mecha(Red) are placed in the same deck, they form the "Mars Elite" team. This lowers their AP costs by 10%.