As far as I'm concerned, you got dibs on being the creator of this crossover.
This is a momentous picture. Arms on Misty are an inch or two too long, and maybe not quite as tall, though I don't disapprove of a more commanding Misty. This is good. Faces are also good. The shading around the bulging bits are a tad heavy, especially the chest on Ash... could be more subtle.