Rocket's Mewtwo is card #8 of 9 in Best of Game (2002), a Promo illustrated by Shin-ichi Yoshida. At about $2,400 it is the #1 most valuable card in the set. It is one of 89 Mewtwo cards printed so far.
2 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
1999Base Set
2002Expedition Base Set
2003Ruby & Sapphire
2006Holon Phantoms
2009Pokémon Rumble
2015BREAKthrough
2019Unified Minds
2023Crown Zenith







See the full Best of Game card list
An ungraded Rocket's Mewtwo from Best of Game sells for about $2,400. A PSA 10 is worth more, roughly $31,200 by our estimate, and a PSA 9 around $9,600.
It is a Promo.
Shin-ichi Yoshida drew the art for this card.