I've just recently started looking for KoF cels 
(Wanna find a nice Kyo), and though some probably 
were made (Ad's, maybe some of the animations, 
etc), I assume they didn't make many and they're 
either in the hands of the creator or the MANY 
SNK fan's in asia.  If you do find one, or have 
seen one in a gallery, please share ^_^

---Fireye