Looking for Mr. Goodbart

Valerie Harper as Ma-Ma
Jennifer Saunders as Phoebe Pratt

"Looking for Mr. Goodbart" is the twentieth episode of the twenty-eighth season of the animated television series The Simpsons, and the 616th episode of the series overall. It aired in the United States on Fox on April 30, 2017.

Bart is serving an old woman at a table at a restaurant, showing manners and being educated, and asks the viewer if they'd know why he's doing it and he starts narrating.

Two months earlier at Grandparents' Day, Bart changes the lyrics of a song for the grandparents visiting, and Principal Skinner takes him to detention. Grampa stops them, saying he's strong to punish a little boy but he'd be scared to punish a veteran. Skinner does that and punishes him to write "I just wrote one and I'm already tired" on the blackboard.

At his office, Principal Skinner is thinking of a punishment for Bart when his mother Agnes Skinner walks in and asks him to take her to the bus stop. Without any other punishments in mind, he punishes Bart to do his task.

At the Power Plant, Lenny walks in the reactor core while playing Peekimon Get (a parody of Pokémon Go) and catching a Rottata. Homer shows Lenny and Carl he's playing it too and enters the core, but the shift is over and they close the door on him, sealing him inside.

Bart walks Agnes through the corridor and they meet and makes fun of Martin Prince Jr. and his grandma. Then at the bus, stop he gets on with her to the candy store next to the place she'll depart.

Meanwhile, Homer catches a Rattlesnitch on Frank "Grimey" Grimes' grave and other Springfielders do too. Back at home, Homer gives Maggie a phone with Peekimon Get, giving her a way to see the monsters in her room. The catching goes on, as Homer catches Peekimons at the church, and then tries to catch a skunk thinking it was a Stunkasan, but fails and the skunk throws him its stench and he goes home to get a bath. All cleaned up, the family goes out and they enter the Kwik-E-Mart full of people.