Since I won't be online for most of the rest of this day, I just throw a small progress report (I'll answer whatever needs answering when I come back), I finished the detour to Diglett's Cave and an event on Route2. After that, I will start the mapping of the routes east of Fuchsia (13, 14 and 15), and the event with the legendary I mentioned before will be in one of those routes.
That's all. By the way, as you can notice I have disabled my PM-ing again, so I can be more concentrated on the game ('cause lately all I've been doing was replying tons of PMs, and I need to think more about my own business... :P)