I got these from EGM and Chris Corvell.  It's just to show the difference between the early version  of Super Ghouls N Ghosts, then called Ghouls And Ghosts 3 and the final game.  Note the different enemies and background/foreground features of GaG3 vs the final SGnG!

Ghouls And Ghosts 3 prototype - 1990




Super Ghouls N Ghosts released - 1991