I don't think Feebas can be caught from Platinum, you'll have to trade from Ruby, Sapphire, or Emerald.
u have to evolve febas
i think it was somewhere deep in that cave west of Oreburg city...
to the left of sunnyshore the third fisherman from the left has a feebas
You can find a trainer with a feebas on route 222 to the left of sunnyshore city.
he dosent evolve at a level u must give him lots of poffins and max out his beauty
You can't catch febas at any route. You can only catch febas at MT.Cornet, by fishing with a super rod but only for rondom time
yes, you can find febas and milotic in white. i already have febas but i still don't have milotic, according to my pokedex, milotic location is on route 1
Route 119.
milotic
Good.
there must be a pond close near by (sorry dont remember route) and if you have seen Febas it must be in your pokedex look for it localization and go there
you use a super rode to catch it