Mewtwo ex is card #101 of 109 in Ruby & Sapphire (2003), a Rare Holo EX illustrated by Katsura Tabata. At about $677 it is the #1 most valuable card in the set. In a Ruby & Sapphire booster it turns up about once every 63 packs. It is one of 89 Mewtwo cards printed so far.
1999Base Set
2003Ruby & Sapphire
2006Holon Phantoms
2009Pokémon Rumble
2015BREAKthrough
2019Unified Minds
2023Crown Zenith
202630th Celebration

















See the full Ruby & Sapphire card list
An ungraded Mewtwo ex from Ruby & Sapphire sells for about $677. A PSA 10 is worth more, roughly $8,807 by our estimate, and a PSA 9 around $2,710.
It is a Rare Holo EX, and it shows up about once every 63 Ruby & Sapphire packs.
Katsura Tabata drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Ruby & Sapphire 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.