Same place as in Pokemon sapphire and ruby. lol
small island on the north east. look on the map
mossdeep
In Mossdeep City.
mossdeep city
In Mossdeep clty
Mossdeep City.
In Pokemon Ruby/Sapphire/Emerald in Mossdeep City.
You can get Dive in Pokemon Emerald by going to Mossdeep City and ensure you check all the houses.
Near mossdeep ciry
in is in mossdeep. it is over to the left
mossdeep city dhoom
Northwest of the Mossdeep Space Center.
look in mossdeep city