From Bulbapedia, the community-driven Pokémon encyclopedia.
Jeeves is a recurring character in the Pokémon anime. He was unnamed in the Japanese version. He is Madame Muchmoney's main butler.
Jeeves first appeared in Snubbull Snobbery. He was seen serving Madame Muchmoney's Snubbull, but the Normal-type Pokémon rejected him. Jeeves, along with another two butlers, foiled Team Rocket's first attempt at kidnapping Snubbull. After Madame Muchmoney learned of her Pokémon's desire for the outdoors, Jeeves formally presented her and Snubbull with a new outdoor exercise area.
Ash and his friends later discovered a disheveled Jeeves out in the middle of the forest in The Trouble with Snubbull. He explained that he and Madame Muchmoney had been traveling a lot to try and locate Snubbull so they could bring it back to the Palm Hills mansion. By the time they recovered her from Team Rocket, she had evolved into a Granbull. Eventually, Jeeves and Madame convinced Granbull to return. He was startled by Madame Muchmoney's newfound strength and confidence, and was forced to run home with her despite having access to a vehicle.
Jeeves' English name is derived from the character of Reginald Jeeves, one of the main characters in the short stories and novels of P.G. Wodehouse. Both the name "Jeeves" and the character of Jeeves have come to be thought of as the quintessential name and nature of a valet, butler, or chauffeur, and a "Jeeves" is now a generic term in references such as the Oxford English Dictionary.