You can find it at route 132 at pacifdlog, just look your map, in the currents or after use a good rod. In Pokemon emerald is not very easy to come :/ good luck
You need to use a super rod or good rod in the currents west of Pacifidlog , its also rare so it may take a while
below mossdeep after you get the naitional dex
You get a horsea at routes 132, 133, and 134 by fishing.
Route 226 with good rod
HOW GET A HORSEA ON POKEMONINDIGO.COM
you get horsea on route 226
On the left of Pacifidlog Town, you can use your super rod to fish for horsea.
You can find Volbeat on Route 117 in Pokemon Emerald Version.
sorry, you can't get riolu in Pokemon emerald version.
You can find Horsea at Vermillion City or Routes 10-13
You must trade it from Pokemon firered or Pokemon leafgreen
go fishing or cross the sea repeatedly.
in which version ? In emerald you can find it easily at Mt Pyre
srry to bust ur bubble but thats actually a pokemon hack of emerald