In the original Japanese version of the game, the player can use the Chain Rod to zip vertically through thin walls. This glitch was fixed in all other versions of the game.
The European version of the game received a new title logo (which also removed the copyright symbol) as part of Capcom Europe's short-lived endeavor to introduce some kind of consistent branding across the whole Mega Man franchise, centered on Battle Network, as an attempt to revitalize the series in a region that had never really taken to it in the way the US or Japan did, although the attempt (and the region-specific branding) was widely seen as a failure.