I'm a bit bewildered as to what exactly this is, but one thing is for sure: you guys will be all over this one.
Ebay is hosting an auction for an english version of the Wily Wars for the Sega Geneisis. Yes, the Genesis--not the UK variant, the Mega Drive. As you may (or may not) know, the Wily Wars was only available to North America through Sega Channel, a now defunct online distribution service. The game was never released as a hard copy here, but saw a cartridge release throughout the UK and in Japan.
With that in mind, what exactly is this? The packaging, booklet and cartridge reek of legitimacy, however the auction description seems to imply this is some sort of modded UK version:
For auction is a US Genesis Mega Man Wily Wars, it is a conversion with region lock out removed of the european version, so it works perfect on all US consoles with save feature as well. Fully in english with high quality insert, sticker and manual. It is in near mint to mint condition. Shipping within the US is $6 and $25 elsewhere in the world.
For a mod, somebody really went all out. Just look at the manual--they even went so far as to include Capcom USA copyright and warranty information. Seriously, is the a custom mod or something much grander?
You can view the auction in question right here.