I have no clue but you can get a super rod by talking to the fisherman in the fight area
old rod good rod super rod and pie rod
A Good Rod is available within Roue 209 in Diamond and Pearl.
ebay is a good place
No. It is only with the super rod.
NO Such Thing Only Super Rod/Good Rod/Old Rod.
in the hearthome enterance
you get it in a city called azalea
Barboach can be caught using the Good Rod in many bodies of water in Pokemon Diamond. One of the areas where it is easy to find with the Good Rod is the Great Marsh.
The fisherman on Route 209.
Route 226 with the Good Rod.
in mount cornet with a good rod
in most lakes with your good rod