This is a very beautiful tileset and I wanted to study, how a system of 8x8 tiles for Pokemon style mountains worked with this. I appreciated that thought was given to 2bpp palettes.
I also compared the actual Pokemon Gold and Silver tilesets to this one.
One thing I noticed is, that the Pokemon tileset was much, much more conservative with its tile usage. This tileset on the other hand uses a large amount of alternative tiles to swap in for variety.
This is not an issue on modern hw. But if you intend to use this for a game on a real gameboy, it might be necessary to reduce the scope of this tileset significantly.