you dont need an action replay for groundon, just go to the weather institute, a dude will tell you about weather conditions in an area. if it is realy sunney there will be a cave near by. inside will be groundon.
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if you have action replay you will get to pick a pokemon so groudon is a hard pokemon you need the red orb for groudon on pokemon soul silver version or pokemon heart gold version but use action replay on pokemon pearl,diamond,platinum
No you have to get a gameshark for that
yes
Use action replay.
palpark from sapphire,emerald or ruby