after you find the underwater cavern and defeat Maxie, he is in the cave of origin in sootopolis.Get lots of ultra balls because you'll want to save your master ball for latios.
Apparently Groudon, but you need to trade with ruby to be able to obtain him.
Ruby and Emerald.
Groudon is a Ground type legendary Pokemon and the mascot of Pokemon Ruby. It can only be found in Pokemon Ruby, Pokemon Emerald, and in Pokemon SoulSilver is the player obtains a Red Orb.
you can't you have to trade him through ruby
after you see groudon for the first time but only see it. i no this isn't very helpfull, but ask the question "How do i catch groudon in Pokemon ruby" or ask "Where and how to catch groudon in Pokemon ruby"
You can't get Kyogre in Pokemon Ruby but you can get Kyogre in Pokemon emerald and sapphire and in ruby you only get groudon and rayquaza. In sapphire you get Kyogre and rayquaza and in emerald you can get groudon, Kyogre, and Rayquaza.
Groudon is not available in Sapphire. You have to trade it from Pokemon Ruby, and there is only one Groudon in the whole Ruby game.you cannot catch groudon in sapphire, but you can have it by transfering it from Pokemon ruby or from Pokemon emeraldyou cannot catch groudon in sapphire, but you can have it by transfering it from Pokemon ruby or from Pokemon emerald
YOU CANT!!!!!!!!!!!!!!!!!!! Only in Emerald and Ruby.
You can get a Groudon by trading it from either Pokemon Ruby or Pokemon Emerald.
In Pokemon emerald you can catch Kyrogo and Groudon but in Pokemon ruby you can only catch Groudon.
you can find groudon, mew, mewtoo, rayquaza, kyogre...
Groudon appears in Pokemon ruby
In the mountain after defeating the team magma leader.