you warp out the dungeon.you can recruit him the second time after the story credits.you need to face him alone if you want him to join because he is a 4 star sized pokemon.even if you don't have a friend bow.the chances of recruiting kyorgre is 50%
You find Kyogre at Stormy Sea on 40F.
Unlimited ^.^
you battle them then sometimes they will join your team (kyogre joined mine)
Perhaps Kyogre learns it when you get to a certain level
50 floors.
There's really nothing after that sadly
U use a rainy orb or use to move rain dance or have kyogre in ur party
Pokemon Mystery Dungeon Explorers of Time / Darkness / Sky: Bottomless Sea B1F-B49F.
Kyogre is on the 40th floor of Stormy Sea. You can only recruit him the 2nd time you face him. Plus his recruit rate is 50%
By Beating Mew in the Mystery Jungle. To go to the Mystery Jungle, it is a job. I forgot how to get it though.
After beating mew you can do some rescue missions and get to Ho-Oh.
KEEP ON BEATING IT UNTIL IT JOINES YOUR TEAM!