I don't think so. The easiest way to get a Feebas on Diamond/Pearl is if you have Ruby/Saphire/Emerald find it on there and then use Pal Park to get it to Diamond/Pearl
Yes, you can. If you get the code Pokemon modifier, and get feebas, activate the code, and turn on the game, it should work. the only problem is that if you use the modifier, you have to go into the grass, and it'll look really stupid and hacked if your feebas' summary says, met at level 10 "whatever you caught it at", route 202. when everyone knows that they're only at mt coronet, so use at your own risk...
you can use an action replay and go to route 213 to catch a trainers Pokemon witch its pobably going to be a feebas you will want to get unlimeted master balls as well
Action replay
Action replay is not an Pokémon item that can be obtained in Diamond.
No
Go to neoseekers.com
no you have to get is from an action replay or go to a Pokemon event
action replay
action replay
action replay
action replay
its a cheat
Action replay.