yes
a good rod or super rod
No
in mount cornet with a good rod
No, try the good rod.
you would use a good rod, but its hard to get feebas its location changes in Mt. Coronet
you can find feebas on the way to catch garitina diaogia and palkia you need to use a good rod to catch him
Mt. Coronet Fog Room (Fish With Old/Good/Super Rod)
To catch Feebas you must go to the northern area of mount coronet where there is the fog. Use defog and then make your way into the water. Use surf and then take out any rod and start fishing every in the water. Feebas is the hardest Pokemon to find on Pokemon platinum so it will take forever to catch it. If you kill it by accident or it runs away during a wild battle don't worry. Feebas usually doesn't move around to different spots in the water. Lastly, you can use your pokedex to find it if you can't understand this and have a good team with you because you will be harassed by Gyarados and Zubat a ton of times.
You can catch feebas with any type of rod in Pokemon sapphire,ruby and emerald but a super rod is the best-good rods and old rods work to but they r harder to catch feebas with :^] I tried that but i just got a whole bunch of carvanas. Its probaly the same catch rate with all the rods. With an old rod, basically every second catch on a Feebas tile will be a Feebas. Also, with the old rod, you usually just have to press once to pull up the catch. With a super rod every catch on a Feebas tile will be a Feebas, but you will often have to press 5-6 times to pull up the catch. if you use a old rod it only catches magicarps,a good rod will only catch medeaim lvl Pokemon and a super rod will catch every Pokemon.its better to use a super rod
if you ment feebas you could go in mt.coronet and go to the room with fog and you will see water and you can use good old and super rods to catch but it will take a while
You can catch it almost anywhere, but you need the good rod to catch it.
you go to celestic town then go into mt coronet use strength on the boulder and go down stairs use defog then use surf on the water use a good or a super rod as many times as you want until you find a feebas. hope this helps