It's Kyogre the first time you go there. He is at level 25 and if you defeat him, he will join your team. From then on, there won't be anything there.
The fortieth floor of the stormy sea dungeon, which you get after you beat story mode.
it is really easy to. he is only level 25. to get to him you have to get to the 40th floor (i think), the bottom of stormy sea. you must have hm dive
recruit kyogre from stormy sea
there are 999 its the impossible dongeon
u go to the 40th floor and fight kyogre. it is exteremly hard to do this with a fire type pokemon.
get the library slip after you get the gold nugget then go and pay to see Mordred's house then click on the piece of paper under the bed then go to the library in the castle the after that click the colored brick right after you go on that bottom floor then go into the dongeon
it is at stormy sea(40th floor)<u will have to get TM Dive to go there , u can get it from whishcash after u've talked to lombre about him almost drown------u will have to beat the game 1st(deafeating rayquaza)
In Pokémon Mysery Dungeon: Blue Rescue Team, you can find Cyndaquil in the Blue Rescue dungeon that is called the Joyous Tower dungeon and you will be able to find it on Floor 13, Floor 14, Floor 15, Floor 16 and Floor 17.
Rayquaza is on the 9th floor.
In Pokémon Mysery Dungeon: Blue Rescue Team, you can find the Kanto grass-type Starter; Bulbasaur in the Joyous Tower dungeon and you will be able to find it on Floor 1, Floor 2, Floor 3, Floor 4 and Floor 5.
On the 20th Floor When you rescue medicham, on the 20th floor, but if you lost that one, there is always another one on the 50th floor. (You don't need a key to get it).
In Pokemon Mystery Dungeon: Red Rescue Team Latias is found after you complete the 25th floor of Pitfall valley.