O Mistério de Robin Hood is a children's adventure film that does not include any discernible LGBTQ+ characters or themes. Consequently, there is no portrayal to evaluate, resulting in a net impact rating of N/A.

The 1990 Brazilian children's adventure film 'O Mistério de Robin Hood' does not feature any identifiable transsexual characters or themes. Based on available plot details and character descriptions, the narrative focuses on a group of children solving a local mystery, with no elements related to transgender identity.

The film is a children's comedy and does not feature any female characters engaging in or winning direct physical combat against male opponents through skill, strength, or martial arts. No significant action roles for female characters are present.

The film "O Mistério de Robin Hood" is an original Brazilian adventure story for children, not a direct adaptation of the traditional Robin Hood legend. It features new characters and does not portray any canonically established character from the Robin Hood mythos as a different gender.

The film features new, original characters set in 1990s Brazil, who are inspired by the Robin Hood legend rather than being direct adaptations of the historically established figures. Therefore, no race swap occurs.