There is a trainer in Eterna Forest who has one.
there are a few that have dustox the first is in eterna forest
Cascoon
Wurmple can go one of two ways, it can evolve into a Silcoon or a Cascoon. Silcoon evolve into Beautifly. On the other hand, Cascoon evolves into Dustox.
no one no trainer has a kingdra in Pokemon platinum exept for me :P
no
)=)=)=) ==
You can find a dustox in eterna forest and there is also a trainer with dustox there too.
I think that Team Galactic's members usually have Dustox.
you can find dustox above the resort area in the grass
Cascoon
You are able to get Dustox by evolving Cascoon. Wurmple-Silcoon-Beautifly Wurmple-Cascoon-Dustox
If you are talking about the elite four, that is Aaron.
Eterna forest
DUSTOX
Dustox.
you can find it in the survival area
Dustox can be found in Eterna Forest. it can also be found by battling these two bug catchers
Cascoon and Dustox