- “Who dares summon me?!”
- ―Justin Bieber
Justin Bieber (also known as Justin Beaver or more colloquially JB) is a Canadian singer, best known for his song Baby. He has gained many fans and haters alike over social media, and to this day is a controversial figure.
He appears in some of SuperMarioGlitchy4's bloopers. He originally auditioned for the role of Mario, as seen in SM64: Meet the Mario. Meanwhile, his songs and pictures of him have been used as weaponry due to how atrocious everyone finds them. Nevertheless, many characters, including Toad, SuperMarioGlitchy3, and Bonnie are Bieber fans.
- Ssenmodnar 2 (100th video) (2 cameos)
- Da Glitch
- 101 Ways for Mario to Die (the right way!)
- Christmas 2013: The 12 idiots of christmas
- SM64: Meet the Mario.
- Legend of Steve
- Retarded64: Freddy's Spaghettiria (cameo)
- Retarded64: Princess Capturing Simulator (cameo)
- SM64: The SMG4 QNA (400k Subs :D)
- SM64: War of the Fat Italians 2015 (600k Special)
- SM64: Meet the Bowser
- SM64: War Of The Fat Italians 2016 (900k Special) (cameo)