The only way is if you saved your game before attempting to capture it and if you failed you can reset the game and try again other than that its not possible to retry catching groudon you can however take a groudon from emerald if you failed to catch it or another ruby game.
So, no.
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You can't go to the moon in any Pokemon game including Ruby You can't go to the moon in any Pokemon game including Ruby
There aren't any Growlithe in Pokemon Ruby, but you can trade for them from Pokemon Fire Red or Pokemon XD.
there is not any combo
Not any hoenn Pokemon but firered and leafgreen can catch alot of kanto and johto Pokemon ruby and sapphire can and can't.
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