Make sure you are facing towards the ocean, pond, lake, etc. All you need to do is open your bag, go to the Key Items pocket, then select the fishing rod and click Use. Watch for this symbol "!", then press the A button.
Dragonspiral Tower, use your fishing rod.
you use pekacho to ruff them up
use the super rod in body of waters
use your old rod while fishing in the middle of route 224 and use it 27 times if you don't find him there try it in the ocean by Sandgem Town. And if it still dosent work try it again but with a good rod.
Canalave City use good rod.
you would use a good rod, but its hard to get feebas its location changes in Mt. Coronet
Use a fishing rod.
Use a super rod.
use a fishing rod!!!!!!!!(near water)
you use pekacho to ruff them up
Dragonspiral Tower, use your fishing rod.
You get the fishing rod after defeating N and Ghetsis and beating the game. Looker from Pokemon platinum will come to your house and ask you to help him catch the 7 sages and you have to accept (trust me, i tried for a long time) in exchange he will give you the super rod which you can use to get super Pokemon( ha ha pun)
use the super rod in body of waters
Pastoria City and Pokemon League, use super rod
use your old rod while fishing in the middle of route 224 and use it 27 times if you don't find him there try it in the ocean by Sandgem Town. And if it still dosent work try it again but with a good rod.
use a good fishing rod in a lake
use good rod at route 224! ^_^