Fighter spirit

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.

Trivia

 * Several fighter spirits do not have artwork from their home series to swap with their Ultimate artwork, instead solely using their Ultimate artwork. These characters are, , , (in his Advent Children costume),  (in his default costume) and the s.
 * Both male and female Pokémon Trainer do have artwork from Pokémon FireRed & LeafGreen, but they're most likely unused as all of the other Pokémon spirits from the game's launch (except for Detective Pikachu) use artwork from Pokémon Global Link.
 * Robin does not have any official artwork from Fire Emblem Awakening, but does have in-game dialogue portraits that another character (Tharja) uses in her spirit as well. They do have artwork in Fire Emblem Heroes and Fire Emblem Warriors, but the rights to those artworks are owned by Intelligent Systems and Koei Tecmo respectively, not Nintendo.
 * The Wii Fit Trainer does not have any official artwork in any of the Wii Fit games, but their colorful silhouettes were seen.
 * While Cloud's default spirit has artwork, his Advent Children costume does not, possibly due to stricter licensing issues with Square Enix with using artwork from a movie rather than a video game. While his Advent Children costume has [[Media:AdventChildrenCloud.png|artwork]] from Dissidia Final Fantasy NT the artwork is owned by Koei Tecmo.
 * This distinction initially applied to the default costume as well, but version 10.1.0 retroactively gave it artwork from Final Fantasy VII, making Cloud the only fighter to have his fighter spirit changed through an update.
 * Being characters original to the Super Smash Bros. series, the Mii Fighters do not have any sources outside of the Super Smash Bros. series to use for their fighter spirits.
 * While Kazuya's Coat costume has alternate artwork, the reason for Kazuya's default costume not having artwork is unknown, as he has plenty of artwork from the Tekken series, but is likely unused as all other Tekken spirits (except for Nina Williams and Yoshimitsu) use artwork from Tekken 7, which lacks artwork of Kazuya in his Gi. Kazuya is the only DLC fighter with this distinction, as well as the only character whose alternate costume has artwork but the default does not.
 * Excluding the ones who only use their Ultimate artwork, is the only fighter that uses artwork from a game outside of her own series, as her "Bayonetta (Bayonetta)" fighter spirit uses artwork from Anarchy Reigns.
 * The Legend of Zelda is the only universe with multiple fighters whose fighter spirits are not organized by fighter number. If they were, would be placed before, and  would be placed before.
 * Similarly, the Koopalings are not ordered the same way as they are on the character selection screen when selecting Bowser Jr.'s alternate costumes.
 * Meta Ridley and Ike (Path of Radiance) are the only fighter spirits that cannot be unlocked via the Vault Shop.
 * ,, and all had spirits before becoming playable; as such, their fighter spirits are denoted with "(Fighter)".
 * is the only character to have a unique Smash render in their fighter spirit, as he uses artwork of him without his mask on as well as Arsène appearing with a render exclusive to the spirit. He is also the only character to feature another character not mentioned by name in their home series spirit artwork, again being Arsène.
 * Neither Luma nor the are present in the home series artwork for, , and Alph's fighter spirits, nor are they mentioned by name (except for Olimar and Alph in Japanese), despite being present in their Ultimate artwork. They instead have separate primary and support spirits.
 * Much like her standard spirit in the base game, Mythra's fighter spirit was altered to avoid raising the game's age rating. This makes Mythra the only character whose design was explicitly edited in her fighter spirit artwork.
 * Palutena, Bayonetta, female Corrin and Pyra's fighter spirits remain unchanged, even though their actual appearances were altered in a similar manner.
 * Sora and Lemmy are the only characters whose fighter spirit artwork and Smash artwork share the same pose. Barring the Timeless River costume, Sora's default spirit more resembles his [[Media:Sora KH1.png|artwork]] from the original Kingdom Hearts rather than his render for Kingdom Hearts HD 1.5 ReMix.