Gardevoir ex definitely derives a lot of its strength from its family: Kirlia SIT has the fantastic Refinement Ability that makes it a draw engine on par with Zoroark-GX, and you have the option to run a Kirlia CRE to use Mirage Step if you couldnt play a bunch of Ralts on your first turn
It's shown up a few times since then--most notably in the recent Doctor Who Universes Beyond expansion--but it's largely stuck to the Ixalan-themed sets
It counters spells, it bounces things back to hand, and it loves to play in a reactionary way
*Okay, technically nine do
Combine it with all sorts of other token-pump spells, and youll be taking the game in no time
Sanji is great as an extra attacker, especially if your opponent is betting on keeping you at high Life cards as part of their game plan (For example, Yellow Sanji )