The 1999 Pokemon Base Set Unlimited #10 Mewtwo PSA 6 is a vintage collectible card game item from The Pokemon Company. This standard-sized card features Mewtwo, a Psychic-type creature with 60 HP, illustrated by Mitsuhiro Arita. It is part of the Base Set and is a Holo Rare card, graded by Professional Sports Authenticator (PSA) with a grade of 6. This English-language card is a Basic stage Pokemon card with Unlimited features, making it a valuable addition to any Pokemon TCG collection.