Rudy Mookich is a young, blond-haired, male human, who wears a red short-sleeved shirt, grey shorts, and black tie shoes. He attends at Chuck Norris Grammar Elementary School.
Rudy is dim-witted boy, who sometimes spends his time alone. whenever he sees Pinky and the Brain, they try to trick him into something else.
Still like Monty, he thinks Elmyra is a drippy little nerd, but she is one of his only friends, and he will occasionally call her into service to help him pester Pinky and the Brain. Elmyra loves the attention, figuring her "boyfriend" has come around and appreciates her at last.
He sometimes have a crush on "Patty Ann" which is actually Brain in a robotic suit which makes Elmyra jealous.
Despite Rudy's faults, the only major character from Tiny Toon Adventures, Elmyra Duff, seems to harbor maniacal affection for him. In "Squeeze Play", Elmyra distracted Rudy, so Pinky and the Brain could sneak into his house to get their latest invention only to get stepped on. In "Party Night", Rudy doesn't want to go to Vaniety's party, which made Elmyra cry. Brain tried to get Rudy to the party to help cheer her up. by the end they did and walked all the way home.
Rudy always wants to date Elmyra's cousin Patty Ann but he always didn't know it was actually Brain in a robotic suit. In "Patty Ann" Rudy skipped school to spend time with her. After Elmyra nagged on pinky and the brain, Elmyra told Rudy Patty will never come back. Then in "At the Hop", Rudy saw Patty Ann and asked her if she wants to dance with him. In "Hooray for Meat", Rudy wanted Patty Ann to become Meat Queen and she did but Elmyra and Vaniety White planned to get the dogs to eat the meat parade float and despite Brain tooken off the robotic suit, Rudy chased after the dogs who got Patty Ann. In Party Night, Brain planned to get Rudy into Vaniety's party by disguising as Patty Ann to get Elmyra and Rudy together but things do not go so well until the party guest starting fighting and Patty Ann pushed Rudy into the fountain and said "Now, you have something to talk about."
Pinky, Elmyra and the Brain
- Episode 1: Patty Ann
- Episode 2: Better Living Through Cheese
- Episode 3: The Cat Who Cried Woof
- Episode 4: The Girl with Nothing Extra, Narfly Ever After
- Episode 5: The Icky Mouse Club, The Man From Washington
- Episode 6: At the Hop
- Episode 8: Wag the Mouse
- Episode 9: The Ravin!, Elmyra's Music Video, Squeeze Play
- Episode 12:Hooray for Meat
- Episode 13:Party Night