The Funko Pop GameStop Exclusive Goku #642 signed by Mario Castañeda is a highly coveted collectible figure in the anime and manga franchise Dragon Ball. This super-sized vinyl figure features the iconic Super Saiyan Son Goku from Dragon Ball Z, making it a must-have for fans and collectors alike. The unique autograph by Mario Castañeda adds a special touch to this exclusive item, making it a valuable addition to any Pop! Vinyl collection.