Some awesome pokemon mechanics explaination

https://mrnbayoh.github.io/pkmn6gen/dexnav_shiny/
https://mrnbayoh.github.io/pkmn6gen/chain_fishing_shiny/

https://gbatemp.net/threads/changing-the-time-in-sun-and-moon.448213/page-3#post-6821604
https://gbatemp.net/threads/is-anyone-else-surprised-about-the-file-size-of-the-pokemone-sun-moon-game-on-eshop.450180/#post-6868494
https://gbatemp.net/threads/is-anybody-researching-sun-moon-shiny-chaining.450904/
If chain is less then 5 -> Fixed 31 IV Count = 0
If chain is less then 10 -> Fixed 31 IV Count = 1
If chain is less then 20 -> Fixed 31 IV Count = 2
If chain is less then 30 -> Fixed 31 IV Count = 3
If chain is 30 or more -> Fixed 31 IV Count = 4

If chain is less then 10 -> Hidden Ability Chance = 0%
If chain is less then 20 -> Hidden Ability Chance = 5%
If chain is less then 30 -> Hidden Ability Chance = 10%
If chain is 30 or more -> Hidden Ability Chance = 15%

About the shiny chance, well the code is not easy to read on this, but it does not affect the chance, it affects the try count.
Everytime a pokemon is generated, there is a "Shiny try count", by default it's 0, so the functions gives up after 1 try.
But somehow the chain count affects this try count, the min is 0, the max is 3.
If i read the code correctly, then it starts after a chain of 70.

Note: this means, it's the default 1/4096 for each try, if 3 trys it's 4/4096 -> 1/1024.