Where should you grade your cards? Understanding the differences between grading companies can help you make better collecting decisions. PSA (Professional Sports Authenticator) is the most established grading company in the Pokmon How to Grade Pokemon Cards PSA, BGS & CGC Guide Poke Master Center PSA GRADING The Sub Center BREAKING NEWS: PSA announces a new grading tier PSA 11 PSA is introducing PSA 11 Pristine + which is meant for cards that exceed the current Gem Mint criteria.. @psacard