Street Fighter II' - Champion Edition [Kouryu] © 1992 Yu.
Kouryu is a hack of "Street Fighter II' - Champion Edition".
* Trick : 99 credits in kouryu for free!
1) Turn off the machine (so you have the default hi-scores)
2) Play a game and beat the hi-score ( its 99.999)
3) Enter 'WBH' as initials for 1st place.
4) You got 99 credits in game.
Game's ROM.