You have to catch a Horsea first, then raise it to Level 32. Surf down to Route 132-134 and fish for one.
Good luck!
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 will only evolve during a trade while it holds dragon scale.
You have to trade seadra while holding a 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.
Seadra only evolves during a trade while it holds the item dragon scale.
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
seadra
Seadra can never level up to evolve. You have to trade it when it is holding a Dragon Scale item. - Pokemon Guru