Inside Out: Crossover

Mara is annoyed with Hiro, lately he's been getting in heated arguments with Twilight as both are very smart, while Hiro reassures her that he and Twilight are friends, they tend to fight a lot, so when Hiro left on an adventure mission with Ian and Barley as usual, Mara suggested taking Twilight with them, which Barley immediately agrees much to Hiro's dismay, Hiro and Twilight are then sent inside of a young tween girl named Riley who helps Hiro and Twilight get along in bizarre way possible.

Note: Crossover Fanfiction On: Inside Out, Big Hero 6: The Series, Big Hero 6, Onward, My Little Pony: Friendship is Magic, Etc.