Take the path down from snowpoint city.
Ace Trainer Garrett on Route 216.
there is a trainer at the end of route 217, by Snowpoint City
ace trainer Blake has it and he is in route 216 just outside MT. Coronet
it is dusclops
on route 216 ace trainer Garret
yeah there is a trainer on route 216 next to the house where you can heal you Pokemon he is an ace trainer who has a dusclops,mr.mime and a scyther. His name is ace trauner Garrett.
You can find dusclops in turn back cave.
DUSCLOPS
Dusclops
Sorry but there isn't a trainer with a bagon in platinum.
Dusclops
no one no trainer has a kingdra in Pokemon platinum exept for me :P