Two Litwick Sit With Their Trainer after a Run [OC]

A rough concept art for a little series I'm making. I considered what I'd do for a partner Pokémon, and ran into a problem. How would my beloved litwick keep up with a runner? So I think I'll do a series showing the trainer and Pokémon grow and evolve together. The above image is just be figuring the narrative out.

(Also, I'm aware those two Litwick are way too big but let's roll with it)