All you have to do is get dive from whishcash ad the go down 40floors till you meet kyogre and the fight him and he might join.
Note: dont bring legederies as he will not join your team if you do.
kyogre
Just count
just go to http://www.upokecenter.com/games/dungeon/guides/wondermail.php
it comes with the pokemon (buy one get one free^-^)
Moltres, Zapdos, Articuno, Groudon, Kyogre, Rayquaza, Deoxys, Mew, Celebi, and a few others.
You need to transfer Kyogre over from Pokemon Emerald/Sapphire, or trade Kyogre to your game from Pokemon HeartGold. If you trade the Kyogre to your game from HeartGold, you can talk to Professor Oak with the two of them in your team to get the Jade Orb, allowing you to catch Rayquaza where you found the other two.
The only way to get Kyogre on your team is with a Friend Bow
You can only unlock this friend area by an optional mission.
Raikou is not in a cave - it's in the Lightning Field on the Mirage Island.
There r 40 floors. Kyogre is at the end of it with 50% recruitment rate.
Kyogre is a Water Type Pokemon. Water Type Pokemon are weak against Electric and Grass Types.
You have to beat team aquas leader. His red orb will glow and kyogre will wake up.