Really Creepy Guy is the annoying mailman that appears in Super Pokeman 64 bloopers: WELCOME TO POKEMANS! in which he ignores Mario, much to the plumber's irration. Eventually he challenges Mario to a Pokémon battle who refuses. Consequentially the guy turns into a winged demon, forcing Mario to accept. He easily defeats Mario.
He is a reference to the Pokémon trainers found in the video games, who ignore the player at first until he crosses their field of view, forcing them to battle.
|Hey bro. Where's the spaghetti at?|
|"I have absolutely no idea what's going on."|