Rare Pokemon Cards: Gold Shiny Secret Rare Cards and TCG Online Code Cards Complete List of Secret Rare Cards from the New 'Battle Partners' Pokmon TCG Set Pokos How rare is the secret Ditto card? ULTRA RARE NIDOKING BGS 8.5 NM MTplus **SQUARE CUT** BASE SET Holographic Pokemon Card!!!!!!!! #6173 Auctionninja.com New to Pokmon cards? Here's a quick breakdown on how to read a cardfrom spotting the Pokmon's Card number and Set symbol, to understanding rarity symbols in the Scarlet & Violet era.