ASearch above, or try one of these.

VSShadow of the Ninja (1990) vs Mighty Bomb Jack (1986)
VSShadow of the Ninja (1990) vs Demon's Crest (1994)
VSShadow of the Ninja (1990) vs Super Mario Bros.: The Lost Levels
VSShadow of the Ninja (1990) vs Adventure Island II (1991)
VSShadow of the Ninja (1990) vs The Mysterious Murasame Castle (1986)
VSShadow of the Ninja (1990) vs Mega Man Xtreme 2