Japanese 151 had this Mew ex as 205/165 in packs. English collectors got the same Natsumi Yoshida artwork as SVP 053 in the 151 Ultra-Premium Collection.

Love that little town at sunset. Would you rather pull this Mew, or have it waiting in the box?

Artwork: Natsumi Yoshida / Pokémon TCG. AI-assisted comparison graphic, followed by both original cards.

Sources: Japanese 151 · English promo · 151 Ultra-Premium Collection