Quoted By:
Here's what I would.
Pokemon Urban Amber, Rural Aqua
Australia superregion (Unda), with two versions starting in one side of the superregion. Urban Aqua is on East Australia and Rural Bronze is on West Australia.
PLA-like gameplay with the entire region being open, but sectioned into wide biomes/zones. There's only few cities and towns separated by vast wilderness.
Starters are Psychic/Dark/Fighting, wild versions exist for the starters.
No old pokemon due to it's isolation from the world. Regional Forms that have adapted to Unda's environment have a presence on the continent in their domestic or invasive forms
No legendaires, however the game's story has a prominent focus on the super rare wild pseudo legendaries of every type that function as the "guardians" of Unda's regions.
Evil Team wants to exploit the pseudo legendaries for their value, powerress and rarity. They aim to sell them through illegal means and also to dominate Unda's Poke League.
You're part of a research team who aims to discover Unda's enviorment and it's unique endemic Pokemon.
You can choose which age your character can be.