There is no phrase.... after my many failed googlings of "what the hell is the phrase"i came to the conclussion after reading many forums n what not that its it set to random when you start you game but changing the trendy just changes the spots. and there is only six spots in 1 pool so be patient and clear alot of time... or be lucky as hell
You can only find him/her on ROUTE 119. There are only 6/about 400 tiles you can find it in.(Tiles are the peices of area your character stands on.) The 6 tiles are changed randomly depending on the "trendy saying" in Dewford town. When you find a tile that has FEEBAS in it, you can use your OLD ROD as many times as you want to get tons of FEEBAS until the Dewford Town "Trendy saying changes. So if you find the FEEBAS tile.... DON'T CHANGE THE "TRENDY SAYING"!!!!!!!!!!
You can capture Feebas on Route 119 in Pokemon Ruby, this is dependant on the phrase in Dewford (that changes it's location) and is luck to find the correct tile that Feebas appears on when fishing.
Feebas is located on route 119 in the river
if u picked torchic as your starter the trendy phrase is "Top Torchic" and search the tile at the bottom of the lake. if u picked treecko as your starter the trendy phrase is " Happy treecko"and search the tile by the waterfall. if u picked mudkip as your starter the trendy phrase is "Just Mudkip" and search the tile way bottom of the lake. Note: this is only Pokemon ruby,sapphire,and emerald after finishing the elite four and must obtain super rod.
feebas can be caught in any waters of route 199.
A long time - Feebas only appears on 4 of the tiles, and whats worse, the locations change randomly every day. (BTW, Feebas is in Mt. Coronet, the section where you go to a lower level and have to use defog. Theres a large section of water on the right - those are the 'tiles') In other words... use the GTS -.- Off-topic but if you happen to have Ruby/Sapphire/Emerald, you're better off trying to catch Feebas there, because the location doesn't change everyday (talking to that trendy phrase guy changes its location)
sex with milotic
with a pokeball
Feebas is in the area south from fortree city you must use a rod to catch it.
trade it from ruby or sapphire
Feebas is hard to find, but about as easy to catch as any other Pokemon. In the 3rd Generation (Ruby, Sapphire, Emerald, Firered, Leafgreen) Feebas can only be caught in 6 tiles of the water on route 119. The location of these tiles depends on the trendy phrase, when it changes, the tiles randomly change their location. In the 4th Generation (Diamond, Pearl, Platinum) Feebas can only be caught on 4 tiles inside Mt. cornet. For Platinum Feebas is in the foggy room of Mt. cornet and can be caught with any rod. For Pearl or Diamond a super rod is required. The location of the tiles changes everyday and it seems that people within the same trainer group will have the same 4 squares.
The "rarest" Pokemon in Ruby, Sapphire and Emerald is Feebas, who only appears in any six random tiles in the river on Route 119, and the six tiles change whenever the "Trendy Phrase" is changed. (In Dewford Town, there's a house with a bunch of people who talk about two random words that you can change by talking to the guy out front.)