You can find Horsea around Whirl Islands, and I suppose you can evolve it from there.
get a seadra and find a dragon scale and give it to seadra and trade it to someone and they will give it back to you but it will be a kingdra
Seadra does not evolve into Seaking. Ever. Period.
Seadra will evolve when you trade it while it holds the item Dragon Scale.
Yes, by trading a Seadra equipped with a dragon scale.
Seadra is #117 in the national pokedex, and it is a Water type Pokemon.
Seadra can be evolved into Kingdra by using a water stone
you can only find it on a Pokemon and its a 5% chance of finding it SO here is a list of Pokemon (in black) who you can find it on: Horsea Seadra Dratini Dragonair Dragonite Kindra Hope this helped!
seadra
Seadra can never level up to evolve. You have to trade it when it is holding a Dragon Scale item. - Pokemon Guru
Have your Seadra hold a Dragon Scale, then trade it with a friend. Seadra will then evolve into a Kingdra.
seadra
kingsea is not a pokemon. if you are looking for horsea, seadra or kingdra, catch a horsea in whirl islands, evolve it into seadra, and trade it with a dragon scale