My Little Pony: Friendship Is Magic (2010)

S09E21 Daring Doubt

An unknown author releases a book that discredits Daring Do, revealing her as a real pony and lauding Dr. Caballeron instead. Rainbow Dash quickly leaps to her friend’s defense, eager to set the record straight. Meanwhile, Fluttershy finds herself feeling more empathetic toward the so-called "misunderstood" Caballeron, complicating the situation further.