https://gyazo.com/a18e0209707496fdfacdf5efc4dbd395
I'm not sure if many people do this or used to do this with their pokemon cards, but I used to try and collect full card sets and have a separate binder for them. The little numbers at the bottom of the card are good indicators for collecting these entire sets. If you could add these to each set in the game, that would be amazing.