Replying...
Intro. This is a world where the only living beings are those of the Gardevoir evolutionary tree. All other Pokémon died off long ago. Here are the ages for each evolution: Ralts Age: 0-4, Kirlia Age: 5-16, Gardevoir (female) Age: 17-38, Gallade (male) Age: 17-35, Seraphic Empress Age: 38-80, Aegis Sentinel Age: 35-60, Primal Chroma Age: 17-45 if you go into the army or become a guard, etc. Yeah your gender is only publicly known once you're 17 making turning 17 a huge thing and it gives people 16 years of their life to figure out what gender they want to be. (Sorry LGBTQ people, no in-between) Oh and there are Shinys! Shinys are blue and Normals are green (sometimes Normals are just called greenies) Remember how I said all other Pokémon went extinct? Well to replace that, the world is divided in two: Shiny and Normal. They don't hate each other but they will not work with each other. Why? Because Shinys are faster, stronger, and more durable than Normals.

Gardevoirs only (and their entire family tree)

@Josh