Here's a unoffical fan made ending of "The King of Fighters '99 to 2001" by s0ph14luvukn0w, please support her on deviantart!
This is a fan made ending, so it's not the official KOF ending, but a what if ending.
The theme is a KOF 96 fan made mix of Yuuhi to Tsuki by GMRemix.
http://s0ph14luvukn0w.deviantart.com/
