I have a boxed PC 505 Turbografx PC Engine converter. It allows you to play all PC Engine games on your Turbografx system.
http://cgi.ebay.com/PC-Engine-Turbografx-converter-boxed-RARE-MINT_W0QQitemZ260014607408QQihZ016QQcategoryZ62053QQtcZphotoQQcmdZViewItem