I thought this might interest some people on this site. To make a long story short I have a japanese pokemon emerald with a legit old sea map. I am now about to start the process of soft-resetting to get a shiny Mew. I will then be doing a giveaway for the Mew (I don't really have any interest in shiny legends). However I do realize how extremely RARE this is, and I cannot pass on the opportunity to now try for a shiny.
I have a video, that I can post if anyone is interested in seeing me legitimately use the old sea map! Just post comments if interested (: