YES of course you can and they can become your friends
Hell yeah..
yes all Pokemon evolve in Pokemon mystery dungeon blue rescue team after you beat Rayquaza and legendary Pokemon don't evolve.
Of course you can!
if you buy friend areas you can do it
Hi,There is a higher chance of that legendary joining you if you battle it alone.Shadowfritsch4
honestly I've never tried it..
there is no ledgendery in southern cave
No. It is a friend area in Pokemon Mystery Dungeon Blue/Red Rescue Team.
If you are talking about Pokemon mystery dungeon red rescue team or Pokemon mystery dungeon blue rescue team then: Talk to alakazam, he'll mention something about the 3 great birds. once you go to them they will give you a stone which allows you into a new dungeon which has lugia.
you can't trade on Pokemon mystery dungeon OK
No, Pokemon Mystery Dungeon: Red Rescue Team is only for Nintendo Gameboy Advance.
Curently, Pokemon Mystery Dungeon: Blue Rescue Team is out and available all around the world.