trade it while holding a dragon scale
you can sometimes catch a horsea that is holding a dragon scale west of pacifilodge town.
Seadra will only evolve during a trade while it holds dragon scale.
Seadra evolves only if you trade it while its holding a dragon scale then take it back and it will be a kingdra instead.
You have to give the Seadra a Dragon Scale then trade it (and back) and it will evolve into a Kingdra.
Seadra does not evolve into Seaking. Ever. Period.
You can evolve Seadra by giving it a Dragon Scale and then trade it. Seadra will then evolve into Kingdra.
Seadra will evolve when you trade it while it holds the item Dragon Scale.
You cannot evolve Seadra using a Water Stone on it. To evolve Seadra into Kingdra you need to trade it while it is holding a Dragon Scale item.
No, to make Seadra evolve, you need a King's rock. Make Seadra hold it and trade it with someone. Then it will evolve and you can trade it back.
Catch a horsea or seadra and put the item on seadra (evolve horsea) trade it with someone else and seadra will evolve into kingdra
Seadra only evolves during a trade while it holds the item dragon scale.
Seadra evolves into Kingdra at level 45.
don't worry in shiny gold seadra evolve to kingdra at lv 50 :)