Mario Tennis Fever[a] is an upcoming 2026 sports video game developed by Camelot Software Planning and published by Nintendo for the Nintendo Switch 2. The game is part of the Mario Tennis series, and is the sequel to the Nintendo Switch game Mario Tennis Aces (2018). Mario Tennis Fever introduces Fever Rackets, which can perform powerful Fever Shots with a variety of different effects. Additionally, elements from the platform game Super Mario Bros. Wonder (2023) are integrated into the setting. The game contains an Adventure mode in which the Mario cast have to re-learn how to compete in tennis after being transformed into babies. It is set to release on February 12, 2026.
The gameplay of Mario Tennis Fever consists of playing matches of tennis as 38 characters from the Mario franchise, which is the most in the series' history.[1][2] The character roster also includes the debut appearance of Baby Waluigi.[3][4][5] The game features 30 different rackets, each with their own abilities. Multiple modes exist, including "Tournament", "Trial Towers" and "Mix It Up". Tournaments contain live commentary from the Talking Flower introduced in Super Mario Bros. Wonder (2023).[6] In Trial Towers, the player competes in a series of challenges to reach the top of the tower.[4] The Mix It Up mode consists of multiple different game types, including Ring Shot and court matches with specific gimmicks, such as feeding Piranha Plants during the Forest Court Match.[6] One of these takes place on the Wonder Court, which includes the Wonder Effects from Super Mario Bros. Wonder.[7][8][9]
During matches, players can now perform slide and leap shots on their opponents.[10] The game's main mechanic is the introduction of 30 "Fever Rackets", which allow the player to perform a variety of effects during a match, by building up a "Fever Gauge", then performing "Fever Shots". Fever Shots can have advantages for the player, such as causing the opponent's side of the field to have an icy patch where the ball bounces, or making Mini Mushrooms appear, which can shrink the opponent.[7][8] If the player acts quickly, they can return a Fever Shot before it hits the ground and return the effects to their opponent's side of the court.[6][11] If the player takes too much damage, their health will deplete and they will be KO-ed, temporarily removed from the match to heal.[12] Fever Rackets can be disabled to play "Classic Tennis".[10] The software is compatible with GameShare, allowing users to share and receive the game for multiplayer modes. Additionally, by scanning Amiibo figures of Mario characters, the design of the tennis ball will change to a special design based on the character.[13]
Premise
Mario Tennis Fever's Adventure mode is set up by the main Mario cast getting transformed into babies, after encountering monsters on a remote island.[8][14] In order to re-master their tennis skills, they must compete in challenges and defeat bosses.[6]
Development
Mario Tennis Fever was announced in a Nintendo Direct presentation on September 12, 2025, during the introductory segment celebrating the 40th anniversary of Super Mario Bros. (1985).[14] The reveal presented both old and new gameplay mechanics, the new story mode, and announced that the game would be released on February 12, 2026.[7][8] A five-minute trailer for the game was uploaded on January 8, 2026, detailing the available game modes, character roster, and gameplay mechanics.[10] The first color options for Joy-Con 2 controllers, "Light Purple and Light Green", are set to launch alongside the release of Mario Tennis Fever.[15][16]
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