It's MissingNo.! One of, if not THE most famous glitch Pokemon to ever appear in a Pokemon game. Making it's debut in Pokemon: Red, Green, and Blue, there have been multiple theories that MissingNo. is a representation of some of the Pokemon who were scrapped from the game during late development. With this badge... coin... sprite... thing, you can honor the Pokemon who didn't make it, and use it to start convesations about the quirky glitch!