Wikipedia
Counterstereotype
A counter stereotype is an idea or object that goes against a standardized mental picture that is held in common by members of a group and that represents an oversimplified opinion, prejudiced attitude, or uncritical judgment. Although counter-stereotypes arise in opposition to stereotypes, they may eventually become stereotypes themselves if they are too popular.
An example is the character type called the magical negro; Spike Lee popularized this term deriding the archetype of the "super-duper magical negro" in 2001 while discussing films with students at Washington State University and at Yale University.