The story will progress whether you capture Groudon or knock it out. If you knock it out though, you will have to wait in order to attempt capturing it again.
Kyogre will respawn when you defeat the Elite Four in the same location as you have found it in.
You will have to refight Primal Kyogre until you are able to catch it. Otherwise, you won't be able to progress through the story.
Primal Groudon is a fire and Ground-type Pokémon and will be seen in the Omega Ruby and Alpha Sapphire game.
After you complete the Primal Kyogre or Primal Groudon narrative, you can go to the left of the Pokemon League entrance to obtain the Mewtwonite Y.
No Groudon will not be able to mega evolve in Pokémon Omega Ruby or Pokémon Alpha Sapphire however Groudon itself is capable of doing a primal reversion which will revert it into Primal Groudon but it needs to be holding the Red Orb item in order to become Primal Groudon and while the primal reversion is similar to the process of Mega Evolution the process of Primal Reversion is automatically triggered and does not count towards the limit of only one Mega Evolution per battle.
In Scorched Slab on B2F, after you complete the Primal Kyogre or Primal Groudon narrative,you can obtain the Charizardite Y in the bottom left corner of the floor.
The details regarding the new De-evolution method in Pokémon Omega Ruby and Pokémon Alpha Sapphire is that it's not a de-evolution mechanic but rather a Primal Reversion that will allow Groudon and Kyogre to revert to their Ancient forms of Primal Groudon and Primal Kyogre however they will need to be holding the Red and Blue Orbs respectively in order to Primal revert and then as soon as they enter into a battle they will primal revert and Primal Pokémon do not count towards the "1 Mega Evolution per battle" limit.
You will battle Groudon for your chance to capture it in Pokemon Omega Ruby after gaining more power.
The new forms of Groudon and Kyogre are called Primal Groudon and Primal Kyogre which were their ancient forms that are awakened by their respective orbs; the Red Orb and the Blue Orb. Primal Kyogre retains Kyogre's Water-typing however it gains the Primordial Sea ability which activates a heavy version of Rain Dance until Primal Kyogre is removed from battle and during the ability's effects no Fire-type moves can be used.
well when u get far enough in the game u obtain this primal stone for groudon, give it to him as a held item and then go into battle, he will primal evolve right when the battle begins and can happen many times, not just once a battle
The game Pokemon Omega Ruby and Alpha Sapphire has not yet been released. The game will be released in November. When the game comes out the ability of Primal Kyogre will known.
Can't catch another. Trade it for 3 starter.
The Legendary Pokémon that are available for capture in Pokémon Omega Ruby are Groudon, Rayquaza, Regirock, Regice, Registeel, Regigigas, Deoxys, Ho-Oh, Heatran, Cresselia, Latias, Uxie, Mesprit, Azelf, Terrakion, Cobalion, Virizion, Palkia, Giratina, Reshiram, Kyurem, Entei, Suicune, Raikou, Tornadus and Landorus and you can also encounter Latios on Southern Island for a battle in the event that you have the Eon Ticket.The Legendary Pokémon that you can catch in Alpha Sapphire are Kyogre, Rayquaza, Regice, Regirock, Registeel, Regigigas, Deoxys, Lugia, Cresselia, Heatran, Latios, Azelf, Mesprit, Uxie, Cresselia, Virizion, Terrakion, Cobalion, Dialga, Giratina, Zekrom, Kyurem, Suicune, Raikou, Enti, Thundurus and Landor and you will also have the chance to catch Latias on Southern Island provided you have received the Eon Ticket through a code distribution or through StreetPass.
no omega is not a real pokemon, but arceus is considerd the omega pokemon.