EDH is probably the most played format at the store
No, code cards can only be redeemed once, whether that be in the Pokmon TCG Online or saved for later and redeemed in Pokmon TCG Live
Nashi, Searcher in the Dark An evasive 2-drop that gets bigger and fills the graveyard, Nashi, Searcher in the Dark from Duskmourn: House of Horror plays like a powered-down Psychic Frog, which has been more than viable in its home formats of Modern and Legacy
Another useful test is the light test , where you illuminate the card in a dark room with a flashlight or blacklight and compare the amount of light that passes through it to a genuine card
Unlike a lot of people, I was never really one for the flashy foil cards anyway
A PSA 10 card must have 55/45 or better centering, perfectly sharp corners, edges without any damage, and impeccable surface without scratches