Power Points are items that can be used to upgrade Brawlers Power. Power Points can be gained through Brawl Boxes and by using coins to buy them in the Shop.
The amount of Power Points you can buy in the shop varies with the daily offer. Each Power Points offer can only be bought once. Power Points offers change every 24 hours, and after that, they can be bought again.
Some Trophy Road rewards offer Power Points, as well. These rewards come in packs of 25, 75 or 150 Power Points, and they also allow you to chose which Brawler's Power Points you get.
Each Brawler has its own pool of Power Points and once you get enough Power Points, you are able to upgrade them to the next level. Higher levels of Brawlers require more Power Points to upgrade.