BP

BP is the primary way of measuring strength in Crazy Naruto.

Generally, the higher someone's BP is, the stronger their lineup and character. However, BP doesn't always correlate to strength; in the end, skills take precedence over BP.

Increasing BP
You can increase your BP just by playing the game; that is, doing dailies, raiding dungeons, attending events, etc. There is no single "best" way to gain BP quickly other than through topping up.

However, there is a smart way.

Losing BP
Activating limited titles or skins such as "Realm Overlord" and "Six Paths Sakura" will give you a temporary BP and stats increase; however, once the timer for these items runs out, the BP will also be deducted.