four island, just put in a ditto and the Pokemon you want
The Old Sea Map was an event-only item distributed during the Pokémon Festa event in Japan in 2005. It was never distributed on an international scale. In Japan, the Old Sea Chart was used to access Faraway Island where Mew was able to be caught in Emerald Version.
The only way now to get it is to use a game shark.
http://www.gamefaqs.com/portable/gbadvance/code/921905.html Get the Old Sea Chart, and go to Faraway Island
only through action replay or game shark
or use the eReader card in R/S/E/FR/LG and trade it over through PalPark.
you can find groudon in terra cave, first go to the weather insttitute talk to the weatherman and he will tell you a location go there and you will see a small cave go inside
and save the game and there you will see groudon if you want to battle and catch him walk in front of him