>>3409Japanese versions of most old cart games tend to be cheaper than their American counterparts. If you got RGB in box, you also got a physical town map. I have JP Red and Green in box, but no box for my copy of Blue. Blue is the most different for Americans, I think? Unknown Dungeon is a different layout. Red/Green just have different sprites. You can do some sweet glitches in Japanese RGB, like "beating" the game in 5 minutes. For the English release, they fixed a lot of the bugs (still leaving many, ha).
Pic shows my town map, albeit folded up.