Just so you know MoonGem, the phrase and where Feebas is caught is all randomized. It simply changes to a new randomized location when you change your "Cool Phrase". If everyone on these boards switched there phrase to that, I doubt more than 1 or 2 people would be lucky to get a Feebas in the exact square you did. In fact, proly no one would.
On the ohter hand, does anyone know if Feebas stays in the same spot on the new game once you swap records. I know it swaps trendy phrases, so maybe it swaps Feebas spots? Most likely it is just re-randomized.
The easiest way to evovle yuor Feebas is to choose a Nature that boost Special Attack. I prefer Modest myself (+Sp At, -At). Now get the Pamtre Berry from Berry Masters wife, and plant it, water it alot, and harvest 6+ of them. The phrase to get a Pamtre is "Challenge Contest". You must have entered at least 1 contest to get the word "Contest" in your vocabulary. Mix Berries using the Pamtre berries, and it will have a Max Bueaty ultra fast. Lvl up once, and it will evolve.