Leftovers If the Pokmon Leftovers is attached to is your active Pokmon, remove one damage counter from it at the end of your turn
Speaking of hard to get rid of: Graywaters Fixer lets your outlaws make a short but impactful comeback, granting each outlaw in your graveyard Encore
Powerful Trainer Cards: Essential for competitive play, trainer cards that offer strategic advantages are consistently in demand, for instance, Umbreon, Iono, Mewtwo, etc
All of the BREAK cards were done in the same graphic style, with a gold coloured Pokemon surrounded by a unique, square like holofoil pattern
This thing is also really strong in Type Four (rules for it here)