Mewtwo GX from the Great Detective Pikachu set (#17) is a Pokemon trading card released in 2019. Current fair market values for Mewtwo GX are PSA 10: $99.99, PSA 9: $28, PSA 8: $8.50, Raw: $11.41. The most recent PSA 10 sale was $99.99 on July 12, 2026, with 23 sales tracked in the last 30 days. The most recent PSA 9 sale was $28 on June 1, 2026. A raw (ungraded) copy last sold for $11.41 on August 4, 2026. CardIndex has tracked 89 total sales across all grades for this card. There are currently 24 active listings for Mewtwo GX.