You have to be lucky and find them random in dungeons
you usually can find keys in the solar cave
Yes, there are Joy Seed Codes for Pokemon Mystery Dungeon Red.
You can get keys after you beat the game. They are mostly found in Solar Cave, or bought from the Kecleon Market.
No, Pokemon Mystery Dungeon: Red Rescue Team is only for Nintendo Gameboy Advance.
No, you can't, because when Pokemon Mystery Dungeon Red came out the Sinnoh Pokemon didn't exist yet.
yes
find it in a dungeon
you can't
Im feel bad to disapoint but you cant but you can re-recruite any Pokemon you did in red and blue
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.
You can't, nor can you trade Pokemon.
eventually, yes