Pokemon won't stay shiny

[The5thAvocado]

I've created a Pokesav file and I'm using the Action Replay DS.
It's a Porygon-Z and it hatches from an egg after about 250 steps. Its stats are legit and all that, and I set it up to be shiny. It hatches from the egg shiny every time, but when I view the Pokemon's lookup, it's just a normal Porygon-Z.

Do I need to hatch a regular Porygon for this to work or am I just doing something wrong? I've just started learning how to use Pokesav, and so I left many of the fields (Trainer ID, Money, etc.) at 0, thinking that it wouldn't change them.

[Zowayix]

Your Porygon-Z isn't staying shiny because shinyness depends on its Trainer ID and Secret ID.

In Pokesav, you can leave your own Trainer ID and Money blank, but you have to make sure the egg's Trainer ID and Secret ID match yours before you click the "Shiny" button.

If you don't know your Secret ID, there's an AR code that changes your money to your Secret ID (see the AR codes thread).