During trade it must hold dragon scale to evolve.
When you trade it holding a dragon scale.
catch a horsea evolve it into seadra give it a dragon scale and trade it
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.
Because it has to be on Pokemon Diamond,pearl or Plainum.
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 evolves into Kingdra at level 45.
don't worry in shiny gold seadra evolve to kingdra at lv 50 :)