This cave is only accessible in pokemon emerald version to make it appear first you must become the pokemon champion at the pokemon league afterward talk to the scientist on the top floor of the Weather Institute which is located southwest of Fortree City. Anyways after speaking to him he will mention either a Drought or Extreme Rain at a certain route if you go there you will notice the Drought/Extreme Rain if you look carefully around the route you should find a cave/secret diving spot which leads to Terra Cave/Marine Cave. Inside these caves you can capture a level 70 Groudon/Kyogre.
If there is a Drought in a Route on Pokemon Emerald it means Terra Cave has appeared in that Route. Terra Cave is a randomly spawning cave that contains the legendary Pokemon Groudon. Terra Cave only appears after defeating the Elite Four.
You can get a Groudon on Pokemon Emerald in Terra Cave.
If you mean the pokemon, then Terra Cave
It's Terra cave and can only be found in emerald
ude terra cave is groudons cave its probly found near rustbro at least dats where i chaut groudon he is lv70
You'll need to get it from Terra Cave.
In Pokemon Emerald, Groundon and Kyogre are legendary Pokemon. You can find them in the Marine Cave and the Terra Cave.
beat the Pokemon league
Desert ruins, Ancient tomb, Island cave, Sky pillar, Cave of origin, Marine cave, Terra cave.
No.You have to trade from Pokemon Ruby or Pokemon Sapphire, except if you have Pokemon Emerald.Then after you beat the Elite 4, talk to the Weather Institute Owner,He will tell you a route,Head to the route and there will be a cave,It would be either Terra Cave or Marine Cave,Inside if Terra Cave,There will be Groudon,If Marine Cave,There will be Kyogre.
in the terra cave near route 115
nothing, but if you catched it you can train it