Unlocks the 4 secret boss characters:
- Billy Kane
- Axel Hawk
- Lawrence B.
- Wolfgang Krauser
Database match: Fatal Fury 2 (USA)
Database: No-Intro: Super Nintendo Entertainment System (v. 20210222-050638)
File/ROM SHA-1: E1970D1943A3DDB2189F7B4A40B15297507D4CB8
File/ROM CRC32: A26EBFEF