Anyone have any tips to fix a warped card? Unfortunately both my delivery Pikachu cards curved 
Heavy book on top and leave them
1 Like
Well I haven’t had many Pokemon cards warp, but MTG cards these days are like pringles. For MTG cards I typically double sleeve a card and put it in a binder, which straightens it over time. Or you could try compressing it with books/weights for an extended time. The cards curl ultimately because of humidity, so restricting the cards access to moisture by sleeving should help either way. Good Luck!
Cardsaver 1 + book
Sandwich the card between something that is extremely flat and smooth. Then, stack as much weight as you desire on top.