My Little Pony: Friendship Is Magic

Season 9, Episode 21

Episode Title: Daring Doubt

Air Date: 2019-09-21

Overview:

When a previously unheard-of author writes a novel trashing Daring Do, exposing her as a real pony, and praising Dr. Caballeron, Rainbow Dash rushes to defend her friend, while Fluttershy is more sympathetic to the "misunderstood" Caballeron.