First you must go to the solar tower or cave then find the keys. ( You don't need these for HM surf but you can get other rare HM's)
Go to F20 and you will se a HM disk surrounded by water, go through it. ( You need a water Pokemon or a flying Pokemon for this).
You've got surf, go and clear the dungeon, then a mini cartoon will run about a robbery.
Go to nothern range F25 and fight Latios. When you have beaten him it will go to another cartoon and Latios explains about his sister Latias. You can now go to pitfall valley.
Go to F25 and rescue her, clear the dungeon then you will see her.
Then they will thank you and join your team.
Latios is level 30 and Latias is level 28.
Now you can go to Joyous Tower.
joyous tower has 99 floors
It is in joyous tower.
In Pokémon Mystery Dungeon: Red Rescue Team and Blue Rescue Team, the Joyous Tower is simply a difficult bonus dungeon with no real goal at it's end. Joyous Tower does however contain many rare Pokemon specifically Chansey.
If you didn't start as Cyndaquil, you can recruit a Cyndaquil in Joyous Tower. They can be found in 13F to 17F.
you have to go to joyous tower
You can find bulbasaur in the joyous tower.
recruit latios and latias, to recruit them complete soar cave and have Southern island friend area acquired
99
Plusle only appears in red rescue team, and if you have that then hes on Thunderwave cave 4f,5f and Lightning Feild 7f-19f and also Joyous tower 5F-8F
in the sky tower
You have to get a HM Fly.
If you mean Torchic, you can recruit them in Joyous Tower. Floors 11-15 I think :)