There are to ways, but you must have a bike. Go to the North of Slatport you end up in Route 110. You can use a bike or go walking under the Cycling Road or to go faster use a bike and go on Cycling Road. Then your there.
In order to get to Mauville City in Pokemon Sapphire, the player must first visit the museum in Slateport and battle Team Aqua. After getting rid of them, Route 110 is open. At the end of the route, the player battle their rival and then they are free to proceed to Mauville City.
first at all you ll have to beat your father at petalburg cuty.then dad of Wally will give you surf(HM03).Then you have go at route 118 and use it.Isuggest y to catch a goldeen or a zigzagoon to teach it.....i hope that it helps!!!!
Get Surf after getting the 6th gymbadge, then go to it. your welcome
from slateport go north, then by trickmasters house go left under the cycling road bridge and just follow that route
after you beat the 5th gym leader (your dad), talk to wattson in mauville. He is right outside of his gym and will give you the key to new mauville.
Go north from Slateport. There will be a roadblock of Team Aqua members. You will have to defeat the members at the Oceanic Museum, then the road will be open for you.
To get to new mauville
Itβs in New Mauville, which is a cave on a tiny island southeast of Mauville City. Youβll need HM Surf to get there.
new mauville after you get a key from Wallace
In Pokemon Emerald, New Mauville is south of Mauville City. Go to the first Fisherman you see when heading south from Mauville City. Surf on the body of water that he is facing, then turn left. As you keep Surfing east, you will find a cave. If you have a Key from the Gym Leader, Wattson, enter the cave, open the lock, and do your mission for a reward from the Gym Leader!
outside of Mauville. you go south to the the water and use surf if you have it and west. there you will find land that leads to a cave, in that cave is New Mauville use the Basement key given to you by the Gym Leader of Mauville and you are there.( there are some Pokemon that can only found there polemon like Voltorb, it's eveoled form Electrode, magentmite and it's evoled form magenton.
Watson gives it to you
To get to new mauville
First beat the Mauville Gym leader, Wattson.
Itβs in New Mauville, which is a cave on a tiny island southeast of Mauville City. Youβll need HM Surf to get there.
You can find the thunder stone in New Mauville
new mauville after you get a key from Wallace
In Pokemon Emerald, New Mauville is south of Mauville City. Go to the first Fisherman you see when heading south from Mauville City. Surf on the body of water that he is facing, then turn left. As you keep Surfing east, you will find a cave. If you have a Key from the Gym Leader, Wattson, enter the cave, open the lock, and do your mission for a reward from the Gym Leader!
if you are looking for the new mauville basement then you have to go south of new mauville and find a place to surf in the route between mauville and slateport and you will find it on the right side of the screen
You get it from the gym leader. After you beat Norman(Petalburg Gym leader) and get surf, go to Mauville and the gym leader will be standing in the middle. He will give you the key. Then go down near the cycling road and surf. Then go right and you will see a cave.
New Mauville MissionMr. Wattson wants you to turn off the big machine at the end of New Mauville by pressing a red button. The cave's full of Electric-type Pokemon and no Trainers.
You can get a magnemite in New Mauville.
Go south until you are below and out of Mauville City, and Surf in the water until you find a cave: That;s New Mauville.