Fightin' Spirit, apart from that bug with Shiro, is an example of how to do an Amiga game right! Having 1-button, 2-button and CD32 control options, it uses Extra Half-bright mode yet it's in PAL overscan and runs quick on any Amiga, and the CD32 version features better digital music. Both the CD and floppy versions have lyrics and real electric guitar music in the intro, too.
What's not perfect about this game? It's on my Amiga Top 10 for sure.
Unfortunately the only ways I know around the bug have been mentioned already. Start the game in Super Fightin' Spirit mode, or install it with WHDLoad and burn it back to CD.