Which spot do you go an catch feebas in mt coronet?

In Pokémon games, you can catch Feebas in Mount Coronet by fishing in specific water tiles. The most common spot is in the area where you find the entrance to the Cave of Origin, specifically on the northern side of Route 217. However, the exact tiles where Feebas can appear change with each game, so you may need to try different fishing spots in that area until you encounter one.