Mario Tennis Fever is a sports title developed by Camelot Software Planning for Nintendo Switch 2, released in 2026. The game features Mario and a roster of associated characters competing in tennis matches with an exaggerated, action-oriented style. Players have access to a standard array of shot types — including topspins, slices, and lobs — alongside defensive maneuvers and additional movement options. A central mechanic is the Fever Gauge, which builds as players sustain rallies; once charged, it enables the use of powerful Fever Shots. These shots can be further customized through equippable Fever Rackets, each capable of adding distinct special effects to the attacks. The game balances conventional tennis mechanics with character-specific abilities and spectacle-driven gameplay, continuing the series tradition of blending recognizable sport fundamentals with over-the-top Nintendo-style presentation.