Roxie/Shuten-Doji make for an excellent combination, I never thought about it. It works wonderfully!
I especially like the Koffing kneepads, a very original touch.
Our Poison-type Gym Leader's stunning: her glance is perfect.
It screams "Watch out, I'm venomous", it fits both Shuten and Roxie's personalities like a glove, it's incredible.
And the outfit, as other comments said, is beautifully depicted.
Congratulations, this is yet again another Masterpiece!