What trainer has finneon in Pokemon platinum?

Answer 1

I don't think there is a Trainer with a Finneon, but there is a trainer with a Lumineon somewhere.

You can find a Finneon on Route 205 South, Route 218, Route 219, Route 220, Route 221, Canalave City, the Valley Windworks, and the Fuego Ironworks.

You can also find a Finneon in Iron Island if you fish with the Good Rod.

Answer 2

There is fisherman who has finneon on route 222 3rd fisherman and he also has feebas