Welcome Jędrzej! Good to see you here as well. 
Best of luck in this new chapter of your collecting journey.
I agree, he did an absolutely amazing job. I only gave him a link to my steps, my compilation thread, and @citriina’s guide, and he searched through the internet for a couple of days with these tips and made the entire list himself. I had already looked at it in the Species Discord group, but had only found a single missing category of cards (foreign XY Trainer Kit: Pikachu Libre & Suicune), which he was already aware of but accidentally forgot to add to the checklist. Everything was done by Jędrzej himself.
PS @Kerugo: You forgot to add a picture of your Froakie with Polish voice actress signature in your main post. I remember seeing it in your Discord showcase post.
Greetz,
Quuador