If you're unsure if a card is Marked, sleeve it up and try to pick it out of the deck, or ask a friend to do so
What exactly that entails is a mystery to us muggles, but keeping track of your cards is a vital part of the process, one that this DIY card scanner (original German
Boxes dont have guaranteed pull rates, unlike some other TCGs
Image credit: Oxley Grading One of these card grading service providers is Oxley Grading , and theyre located in Singapore Shopping Centre just a few minutes walk from Dhoby Ghaut MRT station
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For individual cards and older booster packs and boxes, you will just have to gain a lot of experience and learn the nuances of real Pokemon products and then make educated purchases, ideally with a means of recourse if it turns out you were scammed (some kind of buyer protection program, etc)