Honchkrow GX is very good at disrupting your opponent's Hand due to its Unfair GX. This GX Attack allows you to reveal your opponent's Hand and discard 2 Cards from it. This effect can be very overwhelming if your opponent's Hand was left with non-usable cards.
Basically, your opponent can't attack or evolve and all your opponent can do is wait until the card he or she wanted is drawn. Then, you can start knocking out your opponent's Pokemon using Honchkrow GX.
In addition, Honchkrow GX Ability prevents your opponent's from playing either Special Energy, Pokemon Tool or Stadium Cards if it is an Active Pokemon. This makes your opponent's Hand limited even more. Most of the time your opponents will give up the game if he or she is trapped by these effects.
Full Article at https://ptcg92.blogspot.com/2019/09/honchcrow-gx-unbroken-bond.html
