Where can I get a super rod in the pokemon diamond game???

Question

I already have the old rod and good rod!.

Thanks ;)

Answer 1

You have to talk to a fisherman at the Fight Area. After you beat the Elite Four that is. You get acesss to that island by going to Snowpoint City and catching the boat

Answer 2

thanks for the star here's yours in return

Answer 3

Talk to every fisherman you see.