Question: are hidden fates cards legal?
Answer: By the time Hidden Fates is released, many of the Shiny Vault cards won't be legal in the Standard format, but they can still be used in the Expanded format. ... With 94 cards in the Shiny Vault, the Pokémon TCG: Hidden Fates expansion has more etched cards than any other expansion in the history of the Pokémon TCG.