you trade seadra holding an dragonscale.
Where to find a dragonscale: some wild horsea/gyarados/bagon hold them, but its rare.
gyarados don't carry any items
thats how you evolve m.r seadra
Seadra does not evolve into Seaking. Ever. Period.
to evolve seadra into kingdra
Seadra to evolve it into a Kingdra.
i dont know asses
Question: How to evolve Seadra in Light Platinum? Normally you need a Seadra (Holding a Dragon Scale) to trade. After the trade Seadra will evolve. In the Game Pokemon Light Platinum i recommend to catch a Carvanha, (Manfarny Lake) and trade it with the Sailor in Seanport City. After you trade your Carvanha, Seadra will evolve to Kingdra. Ps: My Carvanha was lvl 34 and he traded a Seadra lvl 34 too. You have to train your Kingdra 10 levels. (I recommend in the Darkdusk Woods.) Gamehelper X
Seadra can never level up to evolve. You have to trade it when it is holding a Dragon Scale item. - Pokemon Guru
Seadra does not evolve into Seaking. Ever. Period.
After you get one, you trade it to another game when it is holding a Kingsrock.
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.
It evolves when it is traded while holding the king's rock.
seadra
Seadra will only evolve during a trade while it holds dragon scale.
Your Seadra will evolve when you trade it with another person while it's holding a dragon scale (there are two in Black/White on Routes 13 & 18 ). Therefore, for you to obtain Kingdra, you must trade a Pokemon with someone for his/her Seadra that is holding a dragon scale. See related link for more information: http://www.serebii.net/index2.shtml
never
Just trade the Seadra while it's holding a Dragon Scale. It'll evolve into Kingdra.
Yes, by trading a Seadra equipped with a dragon scale.