Zubat, Trogbat, Zugoyle & Flambilluxe

Was wondering what a Hisuian Zubat line could look like. What started as a mere 'fur for the cold' idea evolved into a concept referencing the mineral craving of many animals, and the final evolution having four arms.
Also added Flambilluxe here, at least for now, as it's a bit too sketchy to get its own post.
https://www.artstation.com/artwork/OoN0x6