There is not enough publicly available information for AI to assess this category for this movie.

The film 'I Am Not Big Bird' does not feature any identifiable transsexual characters or themes. The narrative focuses on other aspects, with no elements related to transgender identity or experiences present in the storyline.

The movie does not contain any action or adventure elements.

The film does not appear to be an adaptation of any pre-existing material with established characters. Therefore, no characters are portrayed with a different gender than their canonical or historical representation.

The film "I Am Not Big Bird" features original characters created for this specific production. There are no instances where a character, previously established as one race in source material or history, is portrayed by an actor of a different race.

There is not enough publicly available information for AI to assess this category for this movie.