Blue Guy

Blue Guy is a character who looks exactly like SMG4, except his skin was blue. He only appeared in The Mystery of the Missing White and Blue (40,000 subs special). He has no name.

He was first introduced when Starman3 and Mario try to find SMG4, who they say is missing. Mario puts up wanted signs for SMG4, which SM3 questions. They see the Blue guy, who's back faced them making him look like SMG4. When they walked to him, he turned around and looked at them. After a small talk, he tells them he can't find their friend and walks away. Later on, a Policeman sees him and says the catchphrase STAHP RIGHT THERE, and chases the Blue Guy.

Trivia
When Mario and Starman3 find him, he is not facing him. To add the confusion, his hair is the same color as SMG4's hair color.