That’s why I buy all my game cards 2nd hand. Not only are they a lot cheaper but you can transfer anything left to your own game. Btw poke bank makes it easier for transferring events to other games (I was able to transfer my Hoopa from an event to X from Oras, otherwise impossible without poke bank). Poke bank also allows you to transfer over Pokémon from previous generation. (Such as Arceus).