Checking Manaphy Egg shininess (PokeFinder + TID/SID/PID reading)

[SGalvan]

Hi, I'm interested in finding a shiny Manaphy as quickly as possible with the resources at my disposal. Right now, PkHex and Homebrew only allow me to read save data but not modify it, so my intention is to use PokeFinder to find a combatable TID and SID with the PID of the Manaphy eggs I already have as mystery gifts in the base game, but I don't know how to check for it in the program.

So if anyone is experienced with PokeFinder and can give me some pointers on how to tell if an egg will be shiny when opened after the trade, I would be really grateful as it would save me an absurd amount of time.

[Kaphotics]

You just need to trade the egg to a game where the egg will have a trainer ID that makes the PID shiny. 

If you've received an egg, check the PID then RNG abuse a game to get a trainer ID that will make it shiny. If you've not received the egg yet, then identify a spread you want, and then RNG abuse that spread when receiving the egg, and RNG abuse a hatching trainer as previously described.