On the left of Pacifidlog Town, you can use your super rod to fish for horsea.
go fishing or cross the sea repeatedly.
You get a horsea at routes 132, 133, and 134 by fishing.
you get a horsea and evolve it twice.
level 32
it is usaully held by a horsea
You can get it by, trading a sheldon for a horsea in Paicifidlog Town.
HOW GET A HORSEA ON POKEMONINDIGO.COM
you get horsea on route 226
It evolves at level 32.
In HeartGold or SoulSilver: Catch a wild Seadra, Dratini, Dragonite, Horsea, Dragonair, or Kingra holding the item. Or successfully find and catch a Horsea in the Winner's Path PokeWalker route. In Diamond, Pearl, and Platinum: Catch a wild Dratini, Dragonair, Seadra, or Horsea holding the item. In FireRed and LeafGreen: Find one on the Water Path. In Ruby, Sapphire, and Emerald: Catch a wild Horsea or Bagon holding the item.
You can find Horsea at Vermillion City or Routes 10-13
no you can't but, you can trade bagon for a horsea at pacifidlog town