Mew ex is card #151 of 165 in 151 (2023), a Double Rare illustrated by aky CG Works. At about $6.53 it is the #35 most valuable card in the set. In a 151 booster it turns up about once every 65 packs. It is one of 57 Mew cards printed so far.
3 copies have been graded by players in Holobrook's grading game. None has come back a 10 yet.
POP 1 is still open for PSA, BGS and CGC: the first player to grade this card a 10 with each company gets a one-of-a-kind POP 1 slab. See the Mint
1999Wizards Black Star Promos
2003Nintendo Black Star Promos
2007Secret Wonders
2011BW Black Star Promos
2016Evolutions
2020Darkness Ablaze
2022Lost Origin Trainer Gallery
2023151

















An ungraded Mew ex from 151 sells for about $6.53. A PSA 10 is worth more, roughly $22.86 by our estimate, and a PSA 9 around $13.06.
It is a Double Rare, and it shows up about once every 65 151 packs.
aky CG Works drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open 151 booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.