>>19395424If you're making a hack of third gen or earlier, that may be too complex.
Keep in mind that the map is a grid of 8x8 tiles, and each city/route must align to that grid perfectly. (If you open this pic in a program like GraphicsGale and turn on an 8x8 grid, you'll see what I mean.)
Additionally, for some reason the cursor won't select the top two and bottom three rows of tiles, so you have to make those purely decorative. The big windows on the right are another problem, because they block out parts of the map.
It's one of the pitfalls of making ROMhacks: everything you do, you have to consider whether or not it'll work with the underlying engine. It's incredibly easy to make mistakes, which is why the best hacks take many years to make.
