Groudon is a legendary Pokémon in Pokémon Ruby version. In order to wake him you need to have the red orb.
you get to see there boss wake groudon
after you beat maxie some how the blue orb shines and it will spread and hit groudon
if saphire, pwn kyorge and the doors should open. if ruby, pwn groudon and doors should open. if emerald, wake up rayquaza to get him to stop kyorge and groudon from fightin.
the fight is kinda corny kyogre and groudon can be seen fighting at sotopolis city the fight wil end til you wake rayquaza then rayquaza does a cry and both Pokemon disapear.
Groudon is AWESOME!
There is no ruby in groudon.
groudon is better
groudon
Groudon is from the hoen region.
Groudon's cave is in sootoopolis.
At ruby version Groudon is level 45, at emerald Groudon is level 70.
No, Groudon does not evolve in Pokémon Ruby.