kill them they will join automatically (!!!not sure!!!)
If you're talking about Pokemon Mystery Dungeon Explorers of Time or Pokemon Mystery Dungeon Explorers of Darkness, you can recruit as many Pokemon as you want. If you are talking about Pokemon Mysatery Dungeon Blue Rescue Team or Pokemon Mystery Dungeon Red Rescue Team, you can only recruit a certain number of Pokemon per friend area.
Yes you can
You can recruit Registeel in Pokemon Mystery Dungeon Blue Rescue Team but his recruit rate is 0.01 percent. Registeel can be found at the Buried Relic and his friend area is the Ancient Ruins.
In Joyous tower. But i recommend you to recruit a Combusken in fiery field
purity forest
You can't recruit any Pokemon at the Makukita Dojo.
Hell yeah..
No, you can't, because when Pokemon Mystery Dungeon Red came out the Sinnoh Pokemon didn't exist yet.
You may recruit Groudon after the end credits of the game.
about 90%
Of course you can!
Manaphy isn't in this game he's in mystery dungeon explorers of Time & darkness or Sky