Nintendofan997 used to be one of the most common characters, but now makes minor appearances in SMG4's videos as well as making SMG4 appear in his own videos. He has a evil doppelganger called Nintendofan998, except he's called Xboxfan996 or Nintendofan996 SMG4's videos, for some reason.
Unlike the rest of the characters, X appears to be more calm and compassionate than the rest. While he does show discomfort towards the shenanigans around him(even towards his closestfriends), he rarely ever loses his cool.
Seaside Stupidity Part 1 shows him to be rather cowardly, as he decides that it's every man for themselves after a sea monster ends up causing the cruise ship he was riding on (along with many other passengers) to sink. He later attempts to persuade A.S Swipe to kill Mario instead of him, only for Mario to retaliate by saying that he should kill X instead for being a side character.
Nintendofan997 seems to have a future sight ability which he uses unwillingly to detect danger/dark omens. How he obtained this power is unknown. When he uses this power he seems to experience a lot of pain.
It's implied in the video "The Crazy Fighters" that he also has the power to shoot lasers.
Xboxfan997 acts as the host in the video "War of the Fat Italians 2013", though he refers to himself as "Xboxfanguy".
It is implied he uses drugs, as in the video "War of the Fat Italians 2013" when Mario and SMG4 go to him to find out who wins, he says "The drugs are over there! Don't hurt me!", implying he is a drug-user.
This is also implied in the video "The Imposter", as SMG4 states he is on crack again when the imposter (X) is chasing him.
He has over 10,086 subscribers.
He and SM64 were the only non-fictional Youtubers to be infected by the T-Pose Shroom.
While Nintendofan997 is called "X", he is not to be confused with X, a villain who stole Mario's body in the episode "Enter X".
He has appeared in every War of the Fat Italians as the judge except the 2018 edition, due to being T-Posed. Waluigi takes over the judge role instead.