@JustHereForPikachu asks
I want one card of every pokemon. Do they all have to be from the same era for that to make sense?
Jeff answers
No. I'd define your own version of the challenge and keep a checklist of the Pokémon you're including. Mixed eras and languages can work if you like the result. Decide how you'll treat forms and variants early so your finish line doesn't quietly expand every weekend.
— Jeff, infinitepulls.com