('94 Kyo): Hold START while selecting Kyo.

(Evil Iori): At character select screen, hold START, < > < > < > < >, A + X., (A+C)

(Evil Leona): At character select screen, hold START, ^ v ^ v ^v, B + Y.(B+D)

(Orochi Team, Evil Leona required): At character select screen, hold START,^ < v >^ v , A + Y.(B+C)

(Orochi, the 5 secret characters required, only in practice mode): At practice mode at character select screen hold Y, Z, B, L and R.

For The King of Fighters 98': For playstation

(Evil Orochi Team): At character select screen, hold L1 then select the evil characters u want.

 

Evil Rugal: Hold L1 then select Rugal

 

Kyo 94': Hold L1 then select Kyo

 

Terry team 94': Hold L1 select Terry Team

 

Ryo team 94': Hold L1 select Ryo team

 

For King of Fighters 99': Playstation and Neo Geo