On the phone with my buddy Chester. Keep in mind, he's a cutting edge gamer, has been as long as I've known him. I'm considerably more retro, obviously.
Several years ago, for one Christmas, the gang decided to treat me to something really really special. They had found a copy of the Sailor Moon game for the Sega Mega Drive in Japan. Chester had played imported Mega Drive games on his Genesis plenty of times before, and figured there was nothing to it. However, the game was developed and released shortly after Sega started region-locking their games. So it caught me and everyone else by surprise when I got a screen telling me the game could only be played on a Japanese Mega Drive. I never got rid of the game -- it's a gift from some of my closest friends, after all, and it was the thought that counted. But I'm a software guy, not a hardware guy. And back then, I didn't even know what to do with a soldering iron, so modding my Genny with a region switch was out.
Now that Crystal has put Sailor Moon back in the fandom consciousness, apparently one of them remembered the game. So Chester calls me up. "Hey, Peter! Listen -- those Genesis clones they sell at the Dollar Store. Are they region locked?"
Nope. Depending on the model, some even come with a region switch built in.
"...how do you know which ones have it?"
Have to look around online and check with the heads.
"Do you know if those have the switch?"
...wait, you still have Mega Drive games laying around? I thought you dumped them.
"...well, it's actually for you. So you can finally play your Sailor Moon game. You still have it, don't you?"
"Well, we thought this would enable you to play it."
Those atGames units are horrible. They play by emulation, and the tones are completely off. I would advise against it.
"We really thought we had a way for you to do it. We tried looking for a Mega Key, but we heard they were crap."
They are. They are prone to breaking easily, and super expensive to boot.
"...well, know anybody with a reasonably priced one?"
That's the code you enter into a Game Genie to disable the region lock on the Genny Sailor Moon game.
"...I'm guessing you've played it a few times since you know the code off the top of your head."
DING DING DING! WHAT DO WE HAVE FOR HIM, JOHNNY?!?
....just making sure they didn't waste their money on a lousy region disabler. Those things really were shit.