IT is attached to a wild bagon
If you want an additional dragon scale,that is to use GameShark
The steps...
1.Go to YouTube and type this in the search box,Pokemon Emerald-ALL ITEM on sale!!! (you can just copy and paste from here.The user is smarkoh)
2.Go click on (more info) at the description and the cheat is available there.
3.Pls rate and comment.
***The cheat is for ALL(most) of the items and it only works for emerald
In LeafGreen and Firered it is at six island.When you are on the waterpath(on the way to the dotted hole)Use surf on the water on the right and surf down, you will see the dragonscale on a piece of land.You can also get it as a prize from the trainer tower. It is also attached to wild Horsea. To get the dragon scale with no gameshark you still have to face bagon but get a Pokemon that knows trick and use trick on bagon (make sure the Pokemon with trick has an item you don't want) then after that the Pokemon with trick has the dragon scale! If you use thief against it it'll work but not always.
to find dragon scalego to route 132 and use a super rod. If horsea appears catch it or use theif you could get a dragon scale.
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give it a dragon scale, and trade it.
The Dragonscale is an item in Pokemon Emerald version. There is a chance that certain Pokemon such a Horsea will be holding one when you catch it.
you have to catch a dragon Pokemon holding a dragon scale
I don't think dragon pulse is in Pokemon emerald, sorry.
well you have to have a Pokemon(better if its ghost type) with the move "thief". you then go to meteor falls and find where the bagon are, it will take a while but if you use thief on all of the bagon you encounter, chances are you will get a dragon scale.