How to get a Feebas On pokemon Platinum?

My answer is going to be an add on to Jen's answer.When you've gotten to the foggy part in Mt.Coronet,surf to the upper-right hand corner.From there,move on tile left,turn around and then fish in the upper right hand corner.Fish twice there,then move back to the upper-right hand corner,turn left and fish in the spot directly left of you twice.Continue this pattern until the row is finished,then fish twice in the tile directly down from the end of the row that you were on and then head back towards the upper-right hand corner (the row below it), fishing twice in every tile there is in that row.Feebas only appear in 4 of the mive amount of tiles that are in the lake, and they only have about a 10-25% chance of appearing, so you might have to fish in every tile more than twice.So that means fishing in one spot hoping for a feebas to appear soon isn't a good idea,since as already stated,feebas is only in 4 spots in the lake.