Because Pokemon cards are printed on sheets, errors at the printing stage affect multiple cards sometimes an entire print run
I was intrigued by the idea of showing cards from your hand to express a typal theme
Doctor Oak We're turning 20
LEDD-ENC00 Odd-Eyes Arc Pendulum Dragon Level 7 DARK Dragon Pendulum Normal Monster ATK 2700 DEF 2000 Pendulum Scale: 8 Pendulum Effect: If an Odd-Eyes card(s) you control is destroyed by battle or card effect: You can Special Summon 1 Odd-Eyes monster from your hand, Deck or GY
(The older edition stars Charizard, Pikachu and Mewtwo.) As well as a rulebook teaching the basics of how to play the Pokmon TCG, each deck also comes with a beginner-friendly guide, helping new players understand the best way to use their unique set of cards
Certain lands from both the allied and enemy color pairings just don't exist in the lore yet since the story messes around with time travel, so were getting a little bit of both in each set