Did you know holo swirl placements can affect the value of a Pokmon card? A holo swirl is the small spiral pattern found in many holographic cards. Because the holo foil 1999 Pokemon Base Set Shadowless Disco Holo Square Cut Test Print Set A Holographic History Of The Pokmon TCG: Stars Abound 1999 Pokemon Base Set Shadowless Disco Holo Square Cut Test Print Set Charizard Legendary Collection (Holo) Pokmon Cards Proxy Proxy King Pokemon Cards Explained For Absolute Beginners