i just wanted to know what the specific things you can do in different seasons no websites i checked actually list things specific to a season
Seasons are there to make the game look more realistic. There are some different things depending on the season you're in.
The Deerling are in different forms depending on the season. Autumn Winter Spring Summer
The Swasbuck are also different Autumn Winter Spring Summer _____ And much more, check the link below for more info.
You can reach different places depending on the season. Fore example, you can get to the ledge in Winter in Irricus City that you can't get to in the other seasons
Different seasons mean different Pokemon to catch. (Like, Spheal only appears in Winter)
You can battle Cynthia during Spring and Summer. ___ More info on Seasons
There's not much that you can do within each season, but here:
There are places in winter where frozen ice don't allow full access to all hidden items, ball items, and even trainers until spring thaws the ice.