Trash Bytes should be cleared

[McSizzle]

Hello, I'm pretty new to pkhex, and I wanted to make a shiny Pokemon in my in-game ot. But every time i try a legal check it keeps saying trash bytes should be cleared.

I figured out that if i just add more to my ot which is 2 letters it makes it legal so I was wondering if there's a way to make a pokemon with it's ot with just 2 letters

[Kaphotics]