you go to sootopolis city and than talk to Wallace the gym leader of sootopolis to go to the cave of origin to catch kyogre!
take the meteorite
team aqua and team magma, u have to beat them both as opposed to ruby and Sapphire where u only have to beat the team that is the same color of your game(ruby=magma)(Sapphire=aqua)
you want to beat them in 2ft. of that ,,libary,, its museum.
i think you get to the underwater cavern after beating the 7th gym leader
You have to go to the hideout of team aqua which is in lilycove and beat everybody. then, when u come out, they will be gone.
win gum leader, receved cut HM, take a pokenaw, beat team aqua.
you got to beat the team magma (aqua if in sapphire) at the mountain near lillycove city first. :]
After you beat Team Aqua at the Weather Center, and cross the wooden bridge, May will initiate a battle with you. If you beat her, she'll give you HM02 (Fly) as a reward.
Pokemon Ruby= Magma Hideout at Lilycove Shore Pokemon Sapphire/Emerald= Aqua Hideout at Lilycove Shove Pokemon Diamond/Pearl= After you beat Cyrus at Veilstone City
you battle a team aqua grunt i think cause i don't remember so well you haft to beat him and after the battle he will give you thief
Beat team Magma/Aqua (depending on the game) at wherever they are at this point, and then capture the legendary Pokemon of the game. Then the doors will open.
simple you go to mossdeep city vis surf beat tate and liza then help steven beat team magma in the space place at the northeast of the city and then go into all houses until you reach Stevens house and use dive to find the seafloor cavern and beat team aqua