The 1965 animated short film 'Mouse Hunt' does not feature any identifiable LGBTQ+ characters or themes. Its narrative focuses solely on the comedic conflict between a cat and a mouse, rendering the portrayal of LGBTQ+ elements as not applicable.

The film 'Mouse Hunt, 1965' does not feature any identifiable transgender characters or themes within its narrative. Consequently, there is no portrayal to assess regarding transsexual identity, as no relevant character arcs or story plots are present in the film.

The movie does not contain any action or adventure elements.

The provided details for "Mouse Hunt, 1965" do not include information about source material, specific named characters, or their established canonical genders. Without this baseline, it's impossible to determine if any character's gender was swapped from a prior depiction.

The film "Mouse Hunt, 1965" is an animated production featuring animal characters (mice). The concept of a "race swap" applies to human or human-like characters with established racial identities, which is not applicable to animal characters.