Sets like 151 catered to nostalgia, while Paradox Rift and Twilight Masquerade pushed competitive mechanics
Like most Pokmon cards, the value of Greninja ex depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Scarlet & Violet Black Star Promos)
Even still, this card only goes in one deck, and its a deck that probably wont be all that great
14,823 Inclusions, 2% of 753,101 Decks) Token copies don't count as leaving your graveyard, but as we've explored during our list, if you're doing RatadrabikRatadrabik right, you're double-dipping with more normal recursion anyhow