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He is a giant sentient fork who is the boss of several companies found throughout the Mushroom Kingdom. He could either be a boss or a waiter and is often seen as an enemy of Mario, serving as a foil to him.
Jeeves is a cranky guy who seems like he cares only about honor and dignity, but he's also very interested in money, as we see when Donkey Kong asks him to kick out all of the other customers in the restaurant so that he and Pauline, DK's date, can be alone. At first, Jeeves politely denies DK this request, but when he's bribed with a bag of coins, he eagerly obliges.
He is also somewhat of a perfectionist, as indicated by his refusal to be seen wearing stained clothing, as well as his insistence that only the best players can join the Tennis Aces. He is shown to be an artist, since he made Toadsworth a painting of him as a Mona Lisa parody.
He is shown to be a math teacher although he quits early on although it is understandable as he had tried five times with teaching Mario math but they all failed.
He is shown as a referee for tennis and as Waluigi's coach in training him for the Aces tournament.
He is shown as a painter painting a picture of Mona Toadsworth, which was just the Mona Lisa with Toadsworth's face on it for his friend.
He is shown as an on-site journalist during the GlitchCon incident and the T-Zombie pandemic. He naturally gets infected and turned into a T-Pose Zombie subsequently.
He appears after being called by Tari where he suggested using a rope to pull Fishy Boopkins out of the well. Although the idea was working, Mario let go due to seeing a quarter, causing it to unravel.
In this episode, he appears as the boss of the Moo Moo Milk company. He is also shown to be a cruel boss who ordered overworking on Steve's cows just so they could give him milk.
Jeeves opposes Mario's efforts to sell lemonade, as he has located his lemonade stand close to his milk café.
Jeeves appears on line at the bank and gives Mario a Rubik's Cube to stop pestering him after slowly getting irritated by him. However, Mario ends up choking on the cube and coughs it up, causing the cube to deflect from a pillar and hit Jeeves, throwing him out of the building.
In his final speaking appearance, Jeeves appears at the beginning of the blooper, wanting payment from Mario for using his taxi. However, Mario dupes him with fake money, enraging him.
He later appears at the end of the video, taking Mario's money before telling him that the events of the video should be a lesson for him.
Jeeves appears in SMG4 Christmas 2018: The Most Important Thing as an example to Bob Bobowski of having someone to spend Christmas with, in his case Toadsworth, hosts a cooking challenge in SMG4: 3 MILLION SUB FAN COLLABORATION!, and attends Desti's funeral along with Shroomy but does not talk in SMG4: Final Hours.
After Season 9, Jeeves was reduced to a background character. His role of a proper, nagging authority figure has been given to Hal Monitor in the first half of the season and Peach Toadstool after the YouTube Arc. He does not properly speak in this season; with his only dialogue being sourced voice lines.
He returned in SMG4: Mario VS Siren Head trapped in a burning building that the Woomy Fire Brigade was putting out. His second appearance that season was when Mario used him and several other characters as bowling pins when he accidentally froze time with the YouTube Remote in SMG4: Mario Gets【Ｗｏｋｅ】. His third appearance was in SMG4: A Totally Normal S̷͍͖͉̙͚͎̑̃̿͑̆̇̚͠M̸͇͇̦̮̌̿Ğ̴̫̗̖͎͔̳4̶̞͇̰̎̀́̚ Episode, when Mario was escaping a horde of Oof Buttons summoned by SMG3 by throwing Jeeves into one of the button's eyes. He appeared again in SMG4: Mario Scratches His Ass when Mario used him as a buttscratcher. His fifth appearance was in SMG4: If Mario Was In Meta Runner and his sixth was in a storybook video in SMG4: Meggy's Part-Time Job. His final appearance in the season is a cameo in several segments of SMG4 2020 COLLAB SPECIAL.