How are .pk8 files serialized?

[titan3k]

I'd like to use .pk8 files in my own project, and I'm unsure how I can open them. I understand its in binary, but how is the file organized, and how can I extract the data from it?

For example, I have a lvl. 100 Regigigas named THANOS attached. I'd like to read all of the data from this file.

T H A N O S.pk8

[BlackShark]

Check the PKHeX source https://github.com/kwsch/PKHeX/blob/master/PKHeX.Core/PKM/PK8.cs