Mario Tennis: Ultra Smash offers the core tennis gameplay you'd expect from the series, with colorful visuals and responsive controls. However, it suffers from a severe lack of content; modes are sparse, the roster feels limited, and its main gimmick, Mega Battles, feels disruptive rather than fun. While local multiplayer with friends can create some enjoyable moments, Mario Tennis: Ultra Smash ends up as a disappointingly barebones experience within the franchise.