You can still find physical copies of this title through various retro retailers and marketplaces:
: New, factory-sealed "rare" copies are available for approximately $139.95 . The King of Fighters Neowave [Xbox Classic]
: Features 43 total characters , including 12 teams and 7 bonus fighters like Geese Howard and Kyo's father, Saisyu Kusanagi . You can still find physical copies of this