You can catch one using the super rod in mt. cornet.
on the left of sunnyshore city. a fisherman has feebas
mt.coronet
in the rsort area
one of the fishermen by sunyshore city has feebas. Try all of them...
mt coronet
Most fisherman:D
fisher man
feebas
You can catch Feebas in Mt. Coronet on B2F on the north side. You can also find Feebas in atrainers party on route 222.
mt corenet
super rod
feebas