Mister Weiner is a tall light green fish with dark green fins and legs. He wears a hot dog suit. He also wears a blue and white striped shirt over the weenie suit with a light yellow undershirt. He also wears a blue bow tie and a cardboard hat.
Mister Weiner is first seen at the Weenie Hut where he decides to hire SpongeBob. However, he is disgusted at SpongeBob's Weenie Patties and fires him on the spot. However, later in the episode, Mister Weiner has his thugs kidnap SpongeBob from his home and forces him to cook more Weenie Patties due to his customers loving them. However, SpongeBob's past employers try to take him back as well, due to the popularity of his food, but Mr. Weiner and the other employers are defeated by the Killer Patty.
Mister Weiner is the first person to employ SpongeBob and the first to kidnap him in the episode, "SpongeBob You're Fired."