Enter and set the difficulty to Normal or higher.
: As the traditional final boss of the series, Orochi can often be unlocked by completing the game with any character. King Of Fighters Wing 1.9 All Characters Unlock
If you want to access the complete roster, this comprehensive guide will show you exactly how to unlock every single character in King of Fighters Wing 1.9 . The Base Roster vs. Hidden Characters Enter and set the difficulty to Normal or higher