That one has a region/refresh check. It can be patched if you have an Action Replay, Game Genie, or similar device, but otherwise you'd probably need switches. As far as I know, it works correctly at 60Hz if the check is removed, but it's been quite a while since I tried it.since you guys say some PAL games play on NTSC, the one I'm talking about is Megaman the Wily Wars(Euro version). Can I just play this or do I have to get an adaptor or switch?
Yes, but games can still check the version register and not run (or, in fact, can make any changes to its behavior that the programmer wants - this is how things like alternate language title screens and censorship works on some games, similar to Neo Geo) if the correct foreign/domestic and 50/60Hz bits are not correct. These bits can be changed by adding a switch to the MD/Genesis, and in most cases it is also possible to patch out the protection with a Game Genie / Action Replay style cheat device. Most first-generation Genesis/MD games don't have a lockout (they just do things like changing title screens e.g. from "Super Shinobi" to "Revenge of Shinobi"), but many of the later ones do.some guy at a import shop told me that any genesis can play mega drive games, but its just a matter of fitting the cartridge in the slot, is this true?
As far as I know, yes. There's a possibility that the conversion to Game Genie format screwed up somehow, but these patches have been tested in another context. I'm pretty sure it was the Euro version and not Japan, and due to the way the patch works I think it would work for both.these codes work for the Euro version of Wily Wars and will allow me to play the game, right?
They might, but don't count on it. They will definitely not work on all games, because this particular patch depends on the fact that MM:WW checks its own country code byte to determine what it needs to check for in the version register - most locked out games I've seen have the check hardcoded to a specific region. I don't know any place to get these codes online, but I do know how to find them.Do these codes work on any other game or not?