Possums

 are NPCs during the Monorail 2015 Event that give event currencies to get Personal Prizes. They appear on the streets of the Player's Springfield near of the monorail's station they escaped from. When the player tapped them, they earned event currency. Rewards could be increased by adding tracks to their monorail.

Rewards

 * Act One: 10
 * Act Two: 10
 * Act Three: 10

Trivia

 * are offspring of Bitey, the opossum who had taken up residence in the monorail's control cabin.
 * The more tracks the Player add to its monorail, the more "possums" will be rewarded.
 * The game (and the show) calls these animals "possums", while they are more correctly called "opossums" as they are North American, and not Australian, species. "'Possum" [note the apostrophe] is a common contraction of "opossum".

Skins
appeared in three random skins. However these skins had no difference except for the look.