The Smeargle model and textures need to be updated, then Smeargles will each have a different paint color overlay based on the information below. Overlay assets are on the repo in Smeargle's folder. Smeargle paint color will be determined based on their combination of "Nature + Characteristic". Pokémon characteristics aren't currently displayed in their summaries, but that's planned to be added later so we'll need to add this anyway. It doesn't need to display in the summary right now, but we'll need to have determining characteristics at least working in the background for the Smeargle mechanic. Details on the characteristic system can be found here: https://bulbapedia.bulbagarden.net/wiki/Characteristic Hiro's comments about how to handle substituting "personality value" when required:   Smeargle Color Determination: Natures will be categorized by which stat they boost: Attack, Defense, Sp.Atk, Sp.Def, Speed, and Neutral. Characteristics will be similarly categorized by which stat they indicate: HP, Attack, Defense, Sp.Atk, Sp.Def, and Speed. The following data shows which combinations of "Nature + Characteristic" categories result in each color. Red = Attack + Attack / Attack + HP / Neutral + Attack / Speed + Defense / Defense + Speed Orange = Attack + Defense / Defense + Attack Yellow = Defense + Defense / Defense + HP / Neutral + Defense / Attack + Sp.Def / Sp.Def + Attack Lime = Defense + Sp.Def / Sp.Def + Defense Green = Sp.Def + Sp.Def / Sp.Def + HP / Neutral + Sp.Def / Defense + Sp.Atk / Sp.Atk + Defense Cyan = Sp.Def + Sp.Atk / Sp.Atk + Sp.Def Blue = Sp.Atk + Sp.Atk / Sp.Atk + HP / Neutral + Sp.Atk / Sp.Def + Speed / Speed + Sp.Def Purple = Sp.Atk + Speed / Speed + Sp.Atk Magenta = Speed + Speed / Speed + HP / Neutral + Speed / Sp.Atk + Attack / Attack + Sp.Atk Pink = Speed + Attack / Attack + Speed Light Blue = Neutral + HP Example: Based on this, a Smeargle with an "Adamant" nature (Attack+) and the characteristic "Sturdy body" (Defense IV) would result in it having an Orange paint color.