Mario

Mario is the mascot of Nintendo as well as one of the main protagonists on the Shyrx channel. Seeing how the channel mainly focuses on Super Mario 64 Machinimas, it should be obvious that Mario appears very frequently.

Appearance
Mario is a short, somewhat fat man, supporting a large nose and a moustache. He wears his iconic red hat and shirt, as well as blue overalls, white gloves, and brown shoes. His hair under his cap is also brown.

Since Mario is the only playable character in Super Mario 64, he serves as the base model for many YouTubers.

Personality
Like other characters, Mario has had no truly defined personality since he was introduced. Sometimes he appears as dumb and annoying, while other times he's heroic and kind. As of recent videos, Mario appears to be showing more of the latter personality, although he seems to be a bit airheaded.

Mario has been shown to have potent fighting abilities, even after the timeline reset mitigated some of them.

Luigi
Being Mario's younger brother, he is very close to Mario and the two work together on pretty much any adventure.

SuperRhys217
Rhys and Mario are close friends, both of which have been around since the start of the channel. Mario almost acts as a guardian for SR217, getting him out of the castle to do stuff occasionally or helping him deal with bad guys.

UltraGamer8
Mario is rather welcoming of Ultra as shown in Brotherly Things, though the two haven't really interacted outside of that.

Story/History
Mario was only referenced or mentioned before the 2013 Halloween special. Since then, he has appeared in almost every machinima on the channel, being one of the main protagonists.

World Traveler 64
Mario calls for everyone to come to the main lobby, trying to figure out what happened the night before. Toad then points out that SuperRhys217 is missing.

After finishing searching for SR217 in Bomb-omb Battlefield, Mario decides to return to the castle and check with everyone. Suddenly, a shadow appears below his feet, causing Mario to jump back. A Heartless emerges from the darkness, then begins to attack Mario. The two fight for a bit, but then the shadow gets immediately destroyed by Uatarlovegames.

Mario eventually returns from Bomb-omb Battlefield with Uatar and shows him to Luigi, UltraGamer8, and Toad. Uatar then warns them all of shadow creatures coming to make all light expire. He makes his leave, having Mario and the others guard the castle while making preparations for what's to come.

M.U.G.E.N
Mario makes an appearance as an assist in both the original SuperRhys217 and SuperRhys217 DX's movesets. Originally, he came in from the side and swung his hammer three times. In the DX version, he walks up towards the opponent and attempts to grab them, kicking them away. Like the other assists in SuperRhys217 DX's moveset, Mario is involved in a super where he slams the opponent down after SuperRhys217 kicks them upward.

Trivia

 * Most depictions of Mario in machinimas show him as a selfish and dumb spaghetti lover. In Shyrx's videos, however, he is a bit more faithful to his official Nintendo appearance.
 * Mario is a very deep sleeper, as shown in That One Doppelganger.