Apparently, the Rockman 4 and RM5 gold cartridges from Yahoo! Auctions turned out to be duds. Nigoli won the auction for the seemingly rare copy RM5 only to discover it was nothing more than a simple paint job:"These Cartridges are definitely not the real deal, as far as it goes with being exclusive. It's basically some sort of simple paint job. The Cartridge I won had some Green spots still appearing just like the Original Famicom Cart Rockman 5 had. I suppose the novelty is nice so it's like it's Gold. It's not that Shiny reflective Gold you usually see on the event / promotional Golden Famicom Carts or FDS Disks."
Darn shame too as the gold edition of Rockman 4 is exceedingly rare--only eight copies exist. A legitmate gold version of Rockman 5 has yet to turn up to my knowledge.