It should be right below Mt chimney but not at the bottom more like in the middle.
You have to dive beside Sootopolis in different spots until you find one with an entrance, then you will find the sub. dive on route 128 and look for a cavern it should be there
team magmas base at mt.pyre go down with the magma emblem and an earthquake will start when it finishes a gap will apear go inside and youre there
To get past the boulders you have to let one of your Pokemon to learn the move strength.
What game are you talking about? On ruby/saphire, go to team magmas hydout where groudon fleas.
after beating them on top of mt. chimy, go to mt. pyre and talk to the old lady, she'll give it to you
Right above Lavaridge Town.
Use Strength.
Go through the jagged path and go through the cave opening u should be in team magmas base
For Sapphire and Emerald, they are not in the cave
The base is at lilycove just a little surf by all of those wailmers
You dont you get the magma emblem at Mt. pyre. Also magmas team base is on jagged pass
a master ball
by having strong Pokemon
it is at mt chimney
Surf right from Lilycove after beating the team Magmas Base
He's At the end when u go throw the hole base he has the legendary PokEmon
you have to go to team magmas base and deafeat there leader in a battle.