What is the highest possible shiny rate in Pokemon Violet?

Question

I've heard about shiny Pokemon (I encountered one before but it exploded) and I really want to get one for myself. I know there is something called sandwiches, so I was wondering how to get the Sparkling Power Lv.3 (and also include easy ways to get the required Herba Mystica from 5-star raids and the sort (I am bad at doing that :())

Comments

https://twitter.com/Sibuna_Switch/status/1593266100627709957

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Updated: https://twitter.com/Sibuna_Switch/status/1602047739751432192

Answer 1

If you have a the Shiny Charm, Sparkling Power Lv.3, and have defeated 60+ Pokemon in a Mass Outbreak, your shiny chance will be 1/512.44. Without the Shiny Charm, the shiny chance will be 1/683.08. If you have the Shiny Charm and do the Masuda method, the chances are 1/512.44

You get Herba Mystica as rewards from five and six-star raid battles in Scarlet and Violet. However, you can increase your chances of getting even more by eating level 2 sandwiches that boost Raid Power.
By crafting a sandwich that boosts Raid Power, you can increase the raid rewards by two, giving you two more chances to earn Herba Mystica.

You should look at Source 2 for more information about farming Herba Mystica.

Source
Source 2
Source 3

Comments

1/512 is also possible with Masuda method and Shiny Charm. The Twitter thread I linked above is the original source for the figures other websites are listing, so it may be good to refer to that.