If you could make a new regional form for a first partner Pokémon, who gets it and what changes?

Pick a classic first partner and give it a fresh twist. Which one are you choosing, and how would you redesign it? Would the typing change? Would the final evolution take on a totally different theme or inspiration? Maybe it evolves differently in this region, or its personality shifts with the environment.

Lay out your concept. What does it look like, what type is it, and what inspired your version?