The only important details to keep in mind when building a new deck in Pokemon TCG Pocket is that decks are only 20 cards in size, and no more than 2 copies of the same card can be used in a single deck
Clearly we are not removing the 33 most played cards in the format
(2) (Quick Effect): You can Tribute 1 monster this card points to
Similarly, whether the Pokmon is a massive fan-favorite can play a hand too, which is why Pikachu, Mewtwo, and Eeveelutions almost always hold some sort of value, but as for Team Rocket's Crobat ex, it's a mystery
To them, bringing the two together is another instance of Magics worldbuilding being undermined by outside sources, and therefore a source of ire
Of course, just flickering this to make more indestructible Phyrexian Golems sounds like a sweet deal