Fighter spirits are a type of spirit in Super Smash Bros. Ultimate. As the name suggests, they are spirits that are based on the playable roster in the game. Like master spirits, fighter spirits do not have any stats, as they are not used in gameplay in any way, though unlike master spirits, they are not used to assist the player at all, only being used for display purposes.
A character's fighter spirit is unlocked either when the player completes Classic Mode as that character, or they purchase it in the Vault shop for 300G. When the player views the fighter spirit in the Collection, the default artwork will be artwork from their home series, but the player can switch it with their artwork from Ultimate instead. Characters that have other characters as alternate costumes (such as gender swaps, the Koopalings, Alph, and the Dragon Quest III, IV, and VIII Heroes) or significant alternate costumes (such as Mario's Building and Wedding Outfits or Pikachu Libre) have separate fighter spirits from the base fighter than can only be unlocked in the Vault Shop. The Mario (Wedding), Meta Ridley, Ike (Path of Radiance), Cloud (Advent Children), and Inkling (Boy) spirits can also be unlocked via challenges, and the Mario (Wedding) spirit can also be unlocked via the Wedding Mario amiibo.
List of Fighter Spirits