Cosmic Clone

A being that resembles the player character and mimics their movement with a slight delay, in such a way that they are where they player was a second or two ago. Usually deals damage on contact, and is often used to make the player keep moving or avoid locations where they just were

Friend 1 (playing Mario Galaxy 2): Dang it, these purple coin missions are so hard!
Friend 2: That's because the Cosmic Clones are pursuing you.