Hi! Thank you for downloading this hack. (Current Version: 1.4a)
This hack is pretty simple in execution, so this readme exists only to outline all of the features.

Pokemon from Gens I-VII appear along with Mega Evolution
Items and moves from Gens I-VII appear
All Pokemon that Frontier Trainers use have been updated to fall more in line with modern tiering
Pokemon and items can be bought at the Exchange Corner
Secret Bases are now on the island. Obtaining symbols leads to getting more furniture
Battle Music from Gens III-V make an appearance
Contest Pokemon and Pyramid Wild Pokemon changed to include all generations
AI improvements which make trainers more prone to switching their Pokemon
Overhauled tutor system. Now there are over 75 moves to learn
The TV in your house now allows you to battle champions from previous games
Many QOL improvements (Bike now automatically mapped to the select button, daily weather, run indoors, faster HP bars)
Bug fixes from the original

If you notice any bugs, please let me know. Here is the Pokecommunity thread: https://www.pokecommunity.com/showthread.php?t=442844