somewhere in emerald but i woodint know cuz my bro sold mine
It's in a cave under water. It's near sootpolis.
you have to use surf and go to sootopolis city from lilycove. then dive down and find the underwater cave.
After you find the stolen submarine in Pokémon Emerald you must go to Mossdeep city. There you will obtain the HM Dive.
in the cave
Find the cave with the broken sumerine and use dive to get up and battle the team auqa people and go in the last entrance in the cave and the key should be there.
You have to find it in the cave
In Pokemon Emerald, Groundon and Kyogre are legendary Pokemon. You can find them in the Marine Cave and the Terra Cave.
You can find them in the underwater cavern
altering cave
what sceintist
in the suber
Granite cave.