If you want to catch easy trout here's what ya do. This trick will only work if you have the "Coin" found by kicking the rocks on the path to Mt.Glaus.(need teppo) And have beaten the Nue so it is spring.
(1) First Buy an "Old Rod" and some "Worms" (Or any bait) From McNiel (2) Catch about 3 Pirana's. Then go to the Fishing spot west of the Farm. (3) Equip the "Coin" as your lure and cast out and wait for a large shape in the water to get hooked then weel him in. (4) Manillo will ask you if you want to buy anything. Say Yes. Then trade your Pirana's for a Sprit. (5) Cast your line out again and try to get it close to a medium shape in the water. (Shadow is Recogniseably bigger than the the other fishes) (6) Weel it in and there you have it a Trout.
NOTE: This trick can also be used on a RainbowTrout in the fishing spot west of where Mygas and McNiel are.