Snoopy Presents: One-of-a-Kind Marcie centers on Marcie's journey of self-discovery and overcoming social anxiety. The film does not include any explicit portrayals of LGBTQ+ characters or themes, focusing instead on universal themes of introversion, individuality, and personal growth within a school setting.

Snoopy Presents: One-of-a-Kind Marcie does not feature any transsexual characters or themes. The narrative centers on Marcie's introversion and leadership, exploring self-acceptance and problem-solving. Therefore, there is no portrayal of transsexual individuals or the trans community within the movie's content.

The movie does not contain any action or adventure elements.

The film's characters, including Marcie and Peppermint Patty, retain their canonical genders as established in the original Peanuts source material. No character's on-screen gender differs from their historical or widely established gender.

Marcie's character in the Peanuts franchise has no explicitly defined or visually unambiguous race in the source material. As such, any portrayal in the 2023 film cannot be considered a race swap according to the provided definition.