Test Subject Bart

"I have no idea what they're giving me to test, but ten bucks is ten bucks."

- 's unlock message.

 is a limited-time premium outfit for Bart that was released on October 6, 2021, as part of the Treehouse of Horror XXXII Event. It was unlocked upon the purchase of a Tray of 132 Donuts for the duration of the event.

About
 appeared in the episode Whacking Day, when Bart imagines a future where he gets a job testing dangerous food additives after being expelled from school. In this sequence, Bart tests a diet cola with a compound called 2-4-desoxyprophenuramine called "Nature's Goodness". The side effect of this cola is being transformed into a monster.

Trivia

 * From Season 4, Episode 20 “Whacking Day”.