Ranked Mode

Ranked Mode matches can be accessed through the Play button in the bottom right corner of the main screen:

In the Ranked Mode, players engage in 6-player matches.
You can win or lose Rating Points (RP) depending on your place at the end of the game. Also, at the end of the game, you need to spend Battle Coupons to claim your rewards.

You receive Rating Points for the 1st, 2nd and 3rd places and lose Rating Points otherwise.
Please note that surrendering counts as a defeat and doesn't give you any Rewards at all.