Super Mario Bros Wonder reinvents the side-scrolling Mario formula with Wonder Flowers that transform levels in unpredictable ways mid-run, from shifting terrain to surreal visual effects. Traditional platforming, power-ups, and multiplayer support remain, but each stage can suddenly twist into something unexpected once a Wonder Flower is triggered.

Its inventive level design pushes classic 2D Mario platforming into stranger, more varied territory while keeping the accessible, jump-and-run core intact. The result is a side-scroller built around surprise as much as skillful platforming.