Well what I do when searching for a spread which has a low Shiny PID frame, I go to Time Finder, then go to 5th gen DS parameters and, Click on Keypress and then on 1, 2 or 3. When having 3 as keypresscombo, you have to press 3 buttons in stead of 1. I mostly use 2. :) Now, try finding a physical spread, then I use >=30/31/>=30/x/>=30/31. Don't think it should bother anyone when you have 30 HP or Def in stead of 31, it doesn't make it less strong. Then more to the right, check the Shiny Only box, and max Shiny Frame, make it 200. Then hit search.
With the results, go the the main window, choose Statonary Pokémon and hit Shiny only and Sychroniseable frame only. There you will have to see if you got a low shiny PID frame. :)