If you can't find a trainer in platinum with a barboach, you can fish in Eterna City with the good rod and try to find one, because i know you can find barboach there.
3 trainers have a Barboach in Pokémon Platinum, one is a trainer on the 2nd floor of the Lost Tower and the other 2 are Fishermen and 1 is on Route 208 and the other one is on the south side of Route 212.
you can find a fisherman far west sunishore city who has two gyrados and a barboach
Fisherman Cody has a barboach. He is on route 208 and you have to surf to get to him.
barboach? http://pokemon.marriland.com/platinum/pokedex/barboach/ look at the bottom
Yes, most fishermen do.
you don't need a trainer,you can find one in the wild by fishing
You catch Barboach using a good rod. He can be found in the areas of the link provided.
Barboach evolves into Whiscash.
use the super rod in body of waters
I found pone above mt.coronet cave of ferity pone activates barboach to a Pokemon (like a fossil with cranidos)
Yes but you have to look for it or trade it from another game.
you can find the trainer with the misdreavus in platinum in hearthome city i believe