You go to the fight arena after beating elite four and champion, after completing the Sinnohdex, and talk to the man in the red up near the first exit that's north from the dock.
Hope it help:)
If it's the same as platinum
You must have seen (don't have to capture) every Pokemon in the sinnoh pokedex
Then go to battle zone and just up from where u arrive is a fisherman, just say yes and you'll get it
For better info go to seribi net it has info on everything in Pokemon
I mean EVERYTHING
pokemon in the sea
you will have to fish for it preferable with a super rod around mossdeep city. you can get the super rod from a man in a house north of mossdeep.
Diamond & Pearl: You can catch a Poliwhirl with a super rod on route 225. or route 225 surfing. or route 227. <(Surfing). and route 228 while surfing.
You can't you need to get the super rod and (On Diamond And Pearl) go into victory rode and fish.But unfortunately Feebas is only in 4 spots in all the ponds down there so its very frustrating.
No. sorry to disappoint!
No.
No, try the good rod.
You can catch it in route 225, in the water, but make sure to use good rod not super rod or old rod
its cawfish and use the super rod at the pond in celestictown
With a super rod, you can find them in almost any waters.
Fish for it outside of iron island with a super rod ;)
You could catch a Shellder at Valley Windworks only by using your super rod
You can catch Lanturn in Pokémon Diamond and Pearl by Fishing with the Super Rod in Route 220.
well if heart gold is like pearl you can catch him using a super rod in the safari zone
No. In Diamond/ Pearl there are four fishing spots, and you can only catch it with a Super rod. In Platinum you do not require the Super rod, but be able to catch it in the same four fishing spots.
Use a good rod in any of the places it says in the pokedex. To catch an Octilery, use a super rod. (Octilery evolves from Remoraid)
you will have to fish for it preferable with a super rod around mossdeep city. you can get the super rod from a man in a house north of mossdeep.
1) catch a magicarp with an old rod 2) evolve it. or catch 130 "gyrados" with a super rod at various locations.