Jeeves is Madame Muchmoney's faithful butler and a recurring character in the Pokémon anime. He goes unnamed in the Japanese version.
Jeeves first shows up in Snubbull Snobbery, where he's tasked with looking after Madame Muchmoney's Snubbull—though the Pokémon wants nothing to do with him. When Team Rocket tries to snatch Snubbull, Jeeves and two other butlers manage to stop them. After realizing her Pokémon just needs more outdoor time, Madame Muchmoney has Jeeves set up a new exercise area for her.
Things get messier in The Trouble with Snubbull. Ash's group stumbles across a worn-out Jeeves wandering the forest; he and his boss have been searching everywhere for Snubbull after she ran off. By the time they track her down with Team Rocket, she's already evolved into Granbull. Jeeves helps convince her to come home, though he ends up shocked by how much stronger and more confident Madame Muchmoney has become—so much so that he has to run back to the mansion with her on foot rather than taking the car.
Content compiled by AnimeList.moe from publicly available sources.