Mossdeep City! You have to surf there from Lilycove City! Read instruction booklet too for details.
There in the gym in mossdeep city by the way the gym leader are actually gym leaders.
the seventh gym in pokemon sapphire is in mossdeep city.
go on google
Go on to defeat the seventh gym in Mossdeep City, if you did not already catch Kyogre.
In Pokemon Sapphire, Ruby and Emerald the 7th Gym that's located in Mossdeep City has Psychic type Pokemon.
sootopolis city, after u awake rayquaza. the gym leader is juan, changed from ruby/Sapphire Wallace
get a level 60-80 exploud that did the trick for me.
To defeat or "beat" the 7th gym leader in Pokemon sapphire there twins and they have a solrock and a lunatone to beat them I suggest about level 40-50 water types.
Easy you go see steven to get the HM Dive then use it to go to Sootopolis City where your last gym is.
You have to surf from Lilycove to Mossdeep city so you can challenge the 7th Gym Leader, The psychic twins, Tate and Liza.
Easy you go see steven (he is in mossdeep city) to get the HM Dive then use it to go to Sootopolis City where your last gym is.
Easy you go see steven (he is in mossdeep city) to get the HM Dive then use it to go to Sootopolis City where your last gym is.