- For other characters that are refered as Guy', see Guy (Disambiguation).
Assassin Guy was an elite Shy Guy that is a member of the Super League of Gay Guys and was a supporting antagonist. As his name implies, he assassinates people.
He only appeared in SM64 Bloopers: Shy Guy Showdown. He uses his katana as a weapon. He was killed by Crazy Guy riding his Pingas Train.
- Assassin Guy's appearance bears a strong resemblance to Deadpool from Marvel Comics.