[Question] Error with National Dex

[Zacchouille]

I have a problem with the national dex, I don't know what I can make for solve it.

The error box say this :

https://imgur.com/pYLNNYG

If someone can help me ^^'
Sorry for my poorly bad english

 

[NettoHikari]

Looks like this error: https://www.pokecommunity.com/threads/443364

Basically, make sure you start from 1 and don't skip any numbers in pokemon.txt.