in the cave between the mt moon and when you get to it then you use flash first, then you surf all the way up and there is a waterfall. one of your Pokemon have to know how to use waterfall, after the waterfall, surf all the way up and then you find a cave on the left and you enter in then you can find some where in the cave because i found it.
You will find the dragon scale deep in Mt. Mortar, which is between route 42 and Ecruteak City.
You can get it by going to the pokeatolon point shop.
it needs to hold a dragon's scale and trade it
you have to catch a dragon Pokemon holding a dragon scale
make it hold the item "dragon scale" and then trade it
If held by seadra during a trade it will evolve to kingdra.
go to lake rage and catch red gyrodos
catch a dragon Pokemon such as horsea and Bagon until you get one holding a dragon scale.
you get kingdra by trading a seadra that is hold "dragon scale" you can get dragon scale by looking in the bottom level of mount mortar you need the HMs Strength, Surf, and Waterfall
The dragon scale is located in Mt. Mortar
You can evolve Seadra by trading it with the Dragon Scale
To get a dragon scale is to catch a horsea or a bagon.