Where do you find a key on abandond ship Pokemon emerald?

You can't actually find a key on an abandoned ship in Pokemon Emerald. There's no abandoned ship location in the game.

There are a few places where keys are important, but they are:

* The Safari Zone: You can find the Key Item needed to access the hidden area by searching for it in the tall grass.

* The Seafloor Cavern: You'll need to find the Key Item that unlocks the entrance to the deeper parts of the cavern.

If you're looking for something specific, please tell me more about the location and what you're trying to find, and I might be able to help.