【Updated: 】
Your grade gauge will increase or decrease based on your performance in races and battles.
Once this gauge has increased to a certain amount, your grade will increase. If this gauge decreases to a certain amount, your grade will decrease. The higher your position at the end of a race or battle, the more your gauge will increase; the lower your position, the more the gauge will decrease.
Notes:
・Players subscribed to the Gold Pass will not have their grade drop below S after reaching grade S.
・Races via With Friends or Others Nearby have no effect on your grade.