In Smash Cups, players compete in a series of increasingly difficult races, earning points in each race. The player with the highest total score at the end wins the cup, earns rewards, and unlocks items.
Many activities can have road and regular power-ups; however, in Smash Cups and other races, riders may also see Power Assist power-ups in the road if the activity creator has turned it On. They are different from other power-ups in that they are automatically spawned if you get behind in a Cup or race. You still have to run over them and, if your power-up holding slot has another power-up in it, you cannot acquire it.
To join a Smash Cup: Home Screen > Play Now > Smash Cups