SPOILER ALERT go to your items and go to... I think its key items and it should be there, also you can get it at dewford and battle the fisherman right next to the cave. If you win you will get the old rod.
The Super Rod is the only Rod that you can use to encounter Feebas in Emerald.
FeebasUse a Super Rod.
you use the good rod in a river or somewhere :/
u use a good rod at the route left to mauvile and u use good rod
in route 226 and use super rod
Use the good rod around dewford town.
When facing water, open your bag and go to key items. There select the Super Rod and then use it.
Use the Super Rod in Lilycove City.
use a super rod in the ocean near lilycove
In the Pokemon League. NEar the waterfall. Use a super Rod
Good or Super rod. You have to fish right at the entrance of Victory Road.
on rount 119 note use super rod