Yes, you can, if you have 2 ds lites or original dses, or 2 gameboys, and a special cord if you have 2 gameboys.
No, it is impossible to trade from crystal to ruby/saphire/emerald. The games are incompatible.
no, trade it from emerald
trade from ruby/sapphire
You can do this after you find the Ruby and the Sapphire for Celio in Pokemon FireRed. then you can trade with Ruby, Sapphire and Emerald.
You can't get Rayquaza in Ruby. You have to trade it from an Emerald game.
Yes
Ruby/Sapphire/Leaf Green/Fire Red/and i think Emerald. if not, trade from emerald to Ruby/Sapphire, and from ruby/sapphire to leaf green. You need to have the Sapphire and Ruby before you trade. you get these after the elite four.
You cannot get Kyogre on Ruby. You either have to trade it with someone who has Sapphire or emerald, or get sapphire or emerald. Sorry...
you cant but you can trade it from ruby, sapphire, and emerald or use the action replay.
You can not get Meditite in Emerald. You must trade from Ruby or Sapphire.
Meditite is not available on Emerald. Trade from Ruby/Sapphire.
you cant get kyogre in ruby you have to trade from sapphire or emerald