Well, I don't know what the catchy phrase is supposed to do but you can catch Feebas without it. Go to Fortree City and go down to Route 119. You must know "Surf" and have a "Super Rod". Go into the water and fish with it. This may sound easy but it involves LOTS of patience. Keep fishing with the super rod up and down the stream, it may take awhile but believe me, Feebas is there. My suggestion is to keep a fast Pokemon to run away from the Carvahna so you don't waste time. Keep repeating this...
* Fish with super rod and constantly move around the stream of route 119 until you run into a feebas (an easy catch).
If you want more!: Don't worry if somehow you didn't catch it, b/c after the battle, you MUST NOT move from that fishing spot, keep fishing in that spot b/c they become quite common in the spot for a limited time. So you can catch as many as you feel like.
To evolve a feebas to a Milotic!: There's only one way to get a Milotic out of a Feebas. You must make pokeblocks to feed it to max out its beauty. Berry Blend at Lilycove's Contest area with Indigo and Blue pokeblocks. The berrys...
Bluk
Oran
Lum
Kelpsey
Hondew
Corrn
and Pamtre...
will make create these pokeblocks to max feebas's beauty. Warning! Feed it pokeblocks wisely b/c they can only eat a max of 12 pokeblocks.
Sorry that it's long, but I and that you understand.
on route 119 there is a fisherman when you battle him he will have the feebas you can catch them right in front of where he is fishing unless you changed the catchy phrase in dewford town then its position will change
trade
the rarest Pokemon in Ruby Sapphire and Emerald is Feebas
Throughout route 119.
in rout 114. with fishing.
you have to max out feebas happines and then level it up one level :DDD
Actually, it's impossible to catch Milotic in any Pokemon Game. But, it's possible to catch its pre-evolution, Feebas. To catch Feebas in Pokemon Emerald, there is a complicated way. But, I know that you can catch Feebas in Route 119. Hope I helped :)
you want catch it with the rod in rout 119.
supe rod
no
Feebas appears when fishing with an old rod in route 119 (extreme rare to the max but I got him in pearl).
it is pretty rare, but keep on trying