Eemeliri/soulgold ? reverse-engineered prompt

Build me a Johto focused Pokémon game that feels like a bigger, modern Gold and Silver experience.

I want the main story to play through the usual gym and Elite Four journey, but with a lot more to explore, new areas and biomes, and a strong postgame with extra battles and surprises. Add the kind of quality of life people expect now, like smoother battle text, better music flow, more options for how the game plays, and smaller improvements that make the whole thing feel faster and nicer.

Please include things like hidden grottos with daily resets, a few tough boss legendary style fights, an achievement system with lots of trophies, multiple starters, Mega Evolution support, battle facilities with Pokémon from every generation, and some familiar HGSS style features like Pokégear and Buena’s password. Make the whole region feel fresh with updated tiles and graphics, while keeping it clearly Johto. Use the existing project structure and assets as much as possible, and look up current docs online if you need to.