Pokemon Red, Kanto Region, by Nicholas Flynt.
Pokemon Red was my first real game for the gameboy, and I studied it to death. I was an avid programmer on the TI-84 calculators all through Junior High and High School, and I was working on porting the maps to a playable version of the game. That never saw the light of day of course (I graduated and got a RealLife(tm) unfortunately) but I saw your site and immediately got out my paper and pencil and went to work.
This is all of the major towns and some of the in-between features, as best I could remember them completely from memory. I haven’t played the original game in several years. Marked are important locations that I could remember, such as the fabled Missingno glitch, the HM Fly which I never found until very late in my first playthrough, and all the locations where Gary encounters you. (To my knowledge, I haven’t missed any Gary encounters on the map— the one at the Plateau is omitted intentionally.)
I remembered the general shape of the Forest and some of the earlier routes, but my route memory fades just outside of Pewter, so I resorted to just showing connections. I also omitted Nugget Bridge and Bill’s house north of Celadon due to running out of paper. I think I have the Gyms, Pokemon Marts, and Pokemon Centers at least in their general locations within each city, which is encouraging.