whith a key that is isaide the cave near the gym

You go in the cave and find kyorge or w/e and then after you catch it or make it faint
then the gym will unlock

Where is the enterence to sootopolis city and how do u get to the gym in sootopolis city?

It's in the middle of the ocean, just swim a little below mossdeep, and to the the left,
you have to know dive, cause you have to dive to get thier and then pop back up to the top
on the other side, the entrance is at the bottom shape of a ring that's underwater.

you gotta figure out the seafloor cavern puzzle then go sootopolis go in the cave of orgin
beat kyogre then go in the gym

tell me how to un lock 8gym

TELL ME HOW TO GET THE OLD MAN TO MOVE PLEASE

who can give me the key of sootopolis city gym

i went to the pokemart bought 50 ultra balls and where is stephen and that one dude

where is kyogre