Working with certain unsupported features?

[PokemonXO]

So, I was reading on about pokemon forms and mega forms such as Zygarde, Lycanroc, and mega pokemon, and saw something about "Parts" not being supported in v17 essentials except through editing the game programming language.

So, if I were to add Gen 6-7 pokemon (I already got the PBS files for them), would this break my game? What do I need to do to fix it?

I also noted that somewhere else, when you add Parts with a program supplied, the height and wieght of the pokemon get messed up.

Here's links to the threads in question:

Gen 7 Pokemon

https://www.pokecommunity.com/threads/387706/page-6

Pokemon Essentials "Parts"

https://www.pokecommunity.com/threads/398925


I want to note that some of the pbs files supplying Gen 7 and even Gen 6 seen on the internet in various locations differ from each other. Not sure if this is because people made variations of the PBS for their own games or if it's because there's no generic with all 809 pokemon plus their alternate forms. I had to mix and match those variating PBS files with one another, doing light or heavy edits to make almost all 809 pokemon work (Pokemon 808 and 809 still cannot be found)