No. In emerald, you can still catch ho-oh, lugia, regirock, regice, and registeel. Ho-oh: Navel rock Lugia: Navel Rock Regirock: Desert Ruins Regice: Island Cave Registeel: Ancient Tomb
By either beating them or catching them.
complete pokedex and catch the rest of the legendairies witch are regirock regice registeel ho-oh and lugia
keep catching pokemon
After beating Red, Professor Oak will give you one of the three Kanto starters. Receive it, then go to Mr. Pokemon to get the Red Orb. Groudon waits in the Embedded Tower located in Route 47.
after beating alder and seeing or catching all Pokemon
yes after beating the elite 4 you can catch both him and groudon.
You would have to get a groudon from someone else if you wanted one before you beat the game.
There are many legendary Pokemon in emerald, such as groudon, rayquaza, groudon, deoxys, and such. Groudon and Kyogre are not available until after beating Wallace, but Rayquaza can be caught right after the major battle between groudon and kyogre.
beating / catching the red gyrados in the lake
You can't catch Groudon in Sapphire. Groudon is avaible only in Ruby and Emerald.
a lot of thing bug catching contest,refacing elite four a whole lot tougher,in ss you can get a groudon,in hg you can get kyorge,pokelethon dome,get kanto staters get hoen starters.
Beating the elite-4 or catching palkia without a masterball.