Gen 5 PID reported as invalid

[Hominid]

Hi, recently I tried changing a nature of one of my Pokémons and when checking it's PID it got reported as Invalid by PokéCheck. I tried changing the methods from 1 to 9 but still no go. Method 2 got reported as Valid for a brief period but it seems it was a fluke.

I've read that PID gets auto-generated when retrieved from GTS, but retrieving still got an invalid PID.

Am I doing something wrong here?

[randomspot555]

This is not a "How do I hack" forum.

This forum is specifically for the purpose of discussing PokeGen, updates, bugs, features, etc..