>>56430111Shouldn't be ranked by game, better to rank them by generation instead. Games in close proximity to each other will have a closer sound, so it's just better to join them together that way.
If we go by that:
Gen VI > Gen III > Gen IV > Gen V > Gen II > Gen VII > Gen VIII > Gen IX > Gen I
You can kinda observe this slope where Pokémon music peaks starting from Hoenn, and then starts to drop off beginning from Alola on.