The film, 'Doraemon: Nobita's Great Adventure in the South Seas,' does not feature any identifiable LGBTQ+ characters or themes. As a children's animated adventure from 1998, its narrative focuses on friendship and adventure without incorporating such elements.

Currently, there is not enough information available to assess the film's portrayal of transsexual characters or themes. Without specific plot details or character descriptions, a determination of positive, negative, or neutral impact cannot be made.

The movie does not contain any action or adventure elements.

The film features the established characters from the Doraemon franchise, such as Doraemon, Nobita, Shizuka, Gian, and Suneo. There is no indication that any of these canonically gendered characters were portrayed as a different gender in this installment.

The film is a Japanese animated production based on the Japanese manga series 'Doraemon'. The main characters, such as Nobita and Doraemon, are canonically Japanese and are depicted as such in this film, consistent with their source material. There is no evidence of any established character being portrayed as a different race.