Version 1.0.15 (Hotfixed)
20489 downloads
The original purpose of this tool, is to recalculate a Shiny PID based on previous legal non-shiny Overworld8 PID. This tool has since been expanded to include IVs searching.
For background: in SWSH, the game actually has PID-IV-EC-Height-Weight correlation for any Overworld/Fishing/Symbol encounter.
So you cannot haphazardly make those into shinies.
In this tool, there's a few different options. For most (when required), you're gonna need to provide a legal non-shiny Overworld8 PID.
(In those scenarios, if your mon wasn't legal, this tool won't provide a PID to make it legal.)
If you do want the tool to provide legal details (besides PID), you can either provide a EC or seed (Overworld Stats Calculations); or select one of the options with longer for Overworld Shiny Calculation.
Overworld Shiny Calculation
Overworld Stats Calculation
Raid Stats Calculation
Experimental: Search via IVs
References:
PKHeX's Source code in relation to Xoroshiro calculation and Stats determination from the seed.
Sysbot Z3 page for raid stats determination from seed.
Leanny's Source code for Ability and Gender determination for raid stats from seed.
Admiral Fish's Raid stats generation write-up.