If you don't have 10 hours to grind Survival Mode, or if you simply want to enjoy immediately, you need to edit the local save file. Since KOF Wing 1.9 was a Flash game ( .swf ), it saves data via Flash Shared Objects (similar to browser cookies).
With the release of version 1.9, the developers introduced a massive roster shake-up, bringing together iconic fighters from SNK’s King of Fighters and Capcom’s Street Fighter . However, launching the game for the first time reveals that several top-tier fighters and powerful boss variants are locked behind the character select screen. King Of Fighters Wing 1.9 All Characters Unlock