uhh could you give us a kind of checklist for us to know what is missing to get the 100%?
https://inkbunny.net/j/315294-argonvile-monster-mind-faq
There is a FAQ posted here which describes the different things people sometimes miss in order to get 100%! For the most part, you should just get there if you play a lot. But if you're not progressing, it's possible you're ignoring a certain pokemon or not doing a certain thing.