These are very different from human error cards, which include typos, wrong art, or other design slip-ups that happened before printing even began
Their playfields are stylish, but not over-the-top, sort of like what would happen if Hearthstone put on a suit and tie and got a day job
Though some retro games were playable this way (after the laborious scanning of multiple cards), with Pokmon the codes generally unlocked extended Pokdex entries, along with other bonuses for the Pokmon shown on the card
Spell Beetrooper Formation Field Spell You can target 1 "Beetrooper" monster in your GY
Short of having a few grand to drop on the Power Nine, I had to figure out a way to speed things along
@KingPokemon An interesting note