You mean level freezer?

Just don't gain exp and focus on power.

Make a list of dailies and events that gives Exp .. Plan what to take and not, do and not .. Level Freezing is easy if you know what you're doing but you also need to know that Level Freezing means sacrificing something ..

Pretty sure that all sage brackets already filled with a lot players who has big bp gap compare to the rest. Unless you are willing to pay big money to not just close the gap but also need to beat at least a few of them, Then I don't see the point to start freeze in the current state of the game.

there are plenty of videos on yt about lvl freezing. the main concept - you either lower the amount of experience you gain or completely stop gaining any exp. as time flows, you'll farm coupons, moon and sun coins, so you'll eventually increase your bp. this strategy is mostly for the f2ps, so you don't wanna waste any coupons on ninja, simply focus on power.