Butterfly Maggie is a premium limited-time costume for Maggie released on August 15, 2018 as part of the Moe's Ark 2018 Event. It was bundled with Trackload of 300 Donuts, and the player would receive an additional 100 donuts after the purchase, paid with real money.
Butterfly Maggie is a fictional character from Homer and Lisa's imagination about being in the Peekimon Get app. They sing a song about being in the game while searching for Phoebe, Bart's friend, in the woods.