Simple. Get the rod from a fisherman in a house in Mossdeep. Then, face any body of water, just not the puddles in some places. Press start, go to bag, go to key items, and it should be there. Choose it, press use, and wait. If it says you have a bite, press A. Try it again if you don't get a bite. Sometimes Pokemon will get away. It takes a longer time to reel in big catches. The little ones are usually Magikarp. When you catch something, you will go into battle with it. You can catch it with a pokeball. I suggest catching them with net balls or dive balls since they are all water Pokemon. Hope I helped! :)
in celestic town use a super rod in the ponds
it can be found in a lot of places in platinum. just use the super rod you got from the fisherman in the fight area.
Use your Old Rod (for a almost guaranteed Magikarp) in any water. Or use your Super Rod in almost any water (I can't remember the specific ponds).
In emerald, ruby, and sapphire, you can find him in petalburg city, routes 102 and 117.
It means exactly what it says. There is a time and place for everything, so you can't ride a bike in a building or use your super rod in the bush.
Use a super rod.
use the super rod in body of waters
in the safari zone, use the super rod
You have to use the Super Rod on Route 226.
Pastoria City and Pokemon League, use super rod
You can use a super rod at sunyshore city where Jasmine is.
I'm pretty sure you use a Super Rod (You can obtain the Super Rod by talking to the man near the entrance of Rt. 225) at the Pokemon League.
First of all,you need a super rod, then you go to mt.coronet and inside their is a waterfall go behind it and use the super rod.
you have to use the super rod in celestic town after you get the national pokedex
in celestic town use a super rod in the ponds
it can be found in a lot of places in platinum. just use the super rod you got from the fisherman in the fight area.
go to route 213 and use the super rod and you shoud get an octillary