Start fishing for Horseas in Route 226 and you should find one holding it.
like by pastoria.
I'm pretty sure you get it by catching random dragon Pokemon and they will be holding it.
Catch or use the move Thief on a wild Horsea or Seadra. There is a 5% chance that they will be holding a dragon scale.
Catch a wild horsea or seadra or us the TM thief there is a 10% chance that one of those has the dragon scale.
you have to catch a dragon Pokemon holding a dragon scale
garintina
to get kingdra you need a seadra and a dragon scale.to get a dragon scale must you caght a seadra.but it´s very hard. it´s 5% chance to you seadra hold a dragon scale . use quickballs it be easer then.
use thief on a wild horsea or catch it. it's really rare though.
catch a dragon Pokemon such as horsea and Bagon until you get one holding a dragon scale.
if u have Pokemon platinum then just trade a Pokemon from your platinum version holding dragon palse.
The dragon scale is located in Mt. Mortar
To get a dragon scale is to catch a horsea or a bagon.