Item description:

The PID-IV generator is a command-line program designed and coded by SCV. This program allows the user to generate legitimate PID/IV combos for their Pokemon in order for them to be 100% legal and pass Legit.exe (a .PKM legitimacy checker). The program is able to do five different operations for both shiny and non-shiny PID/IV combos. These operations are:

Generate a PID for a given nature and IV combination.
Generate the PID for a shiny Pokemon with a given ID and SID.
Generate a chained shiny PID for given IVs, SID and ID.
Generate the PID for a shiny Pokemon with given ID, SID and IVs.
Get the IVs that correspond to a PID.
This is an extremely useful program for those who want to perfect a legal team/paty of Pokemon created using Pokesav or other PKM editors.