If you mean Artisan Cave, you can only find Smeargle.
There is no Pokemon in the Cave of Origin in Pokemon Emerald.
how 2 get in the under warter cave on Pokemon emerald
it is a cave
You can get a Groudon on Pokemon Emerald in Terra Cave.
In Pokemon Emerald, Groundon and Kyogre are legendary Pokemon. You can find them in the Marine Cave and the Terra Cave.
There is no emerald in the Wayward Cave on T.M 26 which is Earthquake
Pokemon Emerald is a role playing game for the Game Boy Advance. There is no such location as the Entora Cave.
There is no Entora cave in Pokémon Emerald. There are many caves in Pokémon Emerald such as the Altering Cave.
Nothing exciting happens there on emerald.
Event
KYOGRE!
In a battle or a cave