chain shiny algorithm?

[DarkStar]

hi, i was wondering if it is possible to use any program or such to generate pokemon with "chain shiny" algorithm without specifying exact IVs? how does the algorithm work? now i know the PID-IV generator has a function #3 that is supposed to do this but for me it never returns any results cause you have to put in the exact IVs, and it always shows up as no results.

thanks

[Codr]

PokeGen can do this.

[DarkStar]

thanks a lot

also anyone else know if there is a working generation 3 save file editor, like pokesav?