latios rayquaza latias (if u have the eon ticket from live Pokemon events) and groudon
if you want to cheat to get all legendary Pokemon on ruby you have to play on the computer
rayquaza, groudon and latios that's all for ruby
the lengendary birds are in caves ex. moltres is at mt. ember and the ground lengendary Pokemon pop out of the grass once in the game. it depends on what your starter Pokemon is to what lengendary ground Pokemon you'll get.
no
you give up all of your lengendary Pokemon
trade or migrate them daaa
Cheat codes. :)
Verdanturf town.
no you can not
Use pokeballs.
Go to the elite 4
You can't get one at all in Ruby. You'll have to trade one from FireRed/LeafGreen.