Holon Legacy (EX Dragon Frontiers 74/101)

Each Pokémon in play that has δ on its card (both yours and your opponent's) has no Weakness and can't use any Poké-Powers.

Card rule

This card stays in play when you play it. Discard this card if another Stadium card comes into play. If another card with the same name is in play, you can't play this card.