Your dad in Petalburg City
the fourth gym its a fire gym
The 4th gym is found on Lavaridge town and the gym leader is Flannery.
You have to Dive and then you can battle the Gym Leader.
The fourth gym is in Lavaridge the 6th is in fortree.
The third gym leader in Pokemon Sapphire is Wattson and he is located in Mauville City.
go to the desert get the fossil and then go to petalburg city and defeat the gym there
In sapphire, the 5th gym leader is your dad, in that city after Oakdale.
defeat the fourth gym leader and when u come out of the gym, may will give u the go-goggles.
The 8th Gym Leader in Pokémon Sapphire can be found in Sootopolis City.
You can with AR.
It is Petalburg City. That is one of the first towns you go to in the game and is the gym that your dad is the leader of. He uses Normal-Type Pokemon.
The 6th gym leader in Pokémon Sapphire is found at the Fortree Gym. The name of the gym leader here is Winona.