Why are there more than 20?

Shadowbrine1

https://drive.google.com/file/d/1KYe5ipuzP6SzBWc1xJYQNqOOG6wQuztJ/view?usp=drivesdk

https://drive.google.com/file/d/1KUHQsgntEYQk2FbVWJ9QSlagUM9NFIAv/view?usp=drivesdk

I was looking at the meta decks and saw that the two best have more than 20 cards and more than 2 of some why?

Blockinlick

https://community.pokemon.com/en-us/discussion/16734/why-are-there-more-than-20

Maybe to account for variations? There is often more than one way to build a meta deck.

I ran into a Mewtwo EX deck the other day that used Dusknoir instead of Gardevior and it wrecked me. I need 2 Dusclops and a 2nd Duskull to try it myself.

Shadowbrine1

That kinda makes sense thanks