I am in desperate need of help answering this question. I looked up on internet and YouTube to see if it's actually possible to catch Mew without using any cheats or events, and I came to this one video, which said to get the Old Sea Map in order to unlock the Faraway Island (Where Mew is). But, in about half of these videos, people were saying that "it is a cheat" or "it's an event" and etc. Is it actually possible to get Mew in Pokemon Emerald (or from other games) without any cheats, action replays, or events for free, since GTS was shut down a few years ago?
Please help me out!!