The 1998 Pokemon Center Phone Card featuring Mewtwo Strikes Back in a horizontal orientation has been professionally graded as a PSA 10 Gem Mint with a population of only 95 copies. This highly coveted collectible falls under the Pokémon TCG category, making it a rare and sought-after item for fans and collectors alike. The limited availability and pristine condition of this card make it a valuable addition to any Pokémon card collection.