to the 8th gym :p but seriosly i think u go to stooplis meaning u have to go under water about west form mosdeep
use dive in the dark water then go into a cave. ue dive again and you should be in sootapolis city
You have to go to mossdeep city and battle the gym leaders, there are 2 of them in a double battle. Your Pokemon should be on level 50 or more before you challenge them though, because they are tough.
beat the 2nd gym and go in the cave
Go on to defeat the seventh gym in Mossdeep City, if you did not already catch Kyogre.
get the key in the od mansion on cinabargo to cinnibar island, then go in that place next to the gym and look for secret key. then get out and then you can go in the gym in cinabar island
You can find it once you enter Gengar's heart. To find it go to Drakfol Cave and go deep inside. There you will find the 7th gym. I would take some rock Pokemon for the leader.
use dive in the dark water then go into a cave. ue dive again and you should be in sootapolis city
go to the seafloor carven
You go on to defeat the eight gym leader.
You have to go to mossdeep city and battle the gym leaders, there are 2 of them in a double battle. Your Pokemon should be on level 50 or more before you challenge them though, because they are tough.
You have to skip the thied and go to the 4th then go to the third.
After you beat your rival after the 6th gym
go to slateport then to the aquaraim
use a Pokemon to get to use "surf" then get to cinnibar island and there you go.
you go to Dragon spiral tower after you have completed the 7TH gym which is ICE
i haven't played that version but if you go to youtube search up pokemon ruby walkthrough
go on google