In emerald find out in ruby orgin cave.
Chat with our AI personalities
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.
i don't know but i remember that you can access the Magma Cave/Hideout in order to battle Maxie / or even not. I think after you defeat Maxie, it is closed. But i Already Finished Pokemon Emerald..
after you have done the bit where you meet ninetales in the game... there will be alot of earthquakes! first alakazam's team goes to defeat groudon but fails! as they don't return... then team rumblerock's golem, team hydro's blastoise and team constrict's octillary, goes to defeat groudon... but after a few days they couldn't even get to him! so they come back as failure's and half dead... then you and your partner volentere to go to save alakazam's team and defeat groudon! then you get access to groudon's dungeon.. then you complete the dungeon and... well... battle groudon! Hope this helped
Once you defeat Groudon, you can't battle him again. It's either you catch him the first time or don't.
It isn't a matter of how many times you defeat it; your level and rank need to be high enough.