Looking for advice for a work-in-progress fan game: Pokémon Godly Awakening

[Charinjago]

Pokémon Godly Awakening is a work-in-progress fan game, in this game you will have to save the region of Hokk (once joint to Hisui/Sinnoh) and, most importantly, the whole Pokémon world from a calamity caused by 3 legendary Pokémon. You will have to face 3 trials in order to receive the 18 plates (eventually you will obtain the Legend Plate, but only after finishing the game) and the Azure Flute that you will have to play in front of a special altar in order to reach Arceus's world and save him.

Here are some features that will be included in the game:
- some Pokémon have their types and stats changed in order to make them more reasonable
- there are mega evolutions and Z moves but not Dynamax and Terastalization, as they are phenomenons exclusive to Galar and Paldea and it wouldn't make sense of they were in another region
- all 1025 Pokémon, including regional variants, are available except for Terapagos because it revolves around terastalization (as I explained before, there isn't terastalization)
- you will be able, at some point in the story, to access the Ultra Space and the Ultramegalopolis

SIDE NOTE: there are no fakemons in the game

I am looking for some advice in order to make the game better, for example, features I could add, things I should change, etc.