3. Brain – Mouse
If you’ve never watched the cartoon Pinky and the Brain, then you might not know that Brain, a white lab mouse, continually has his plans for world domination foiled by his hapless sidekick Pinky. Brain is conniving and maniacal while Pinky is just happy to live in his cage and goof around all day. Brain is a force to be reckoned with, which makes this name very fitting for that supper intelligent mouse that seems like it just might be plotting your demise.