Bdsp doesn’t count in

ah yes the thing we are never actually going to get again

I remember it, but I don't remember what it's purpose is

To have every single Pokémon in the game

Bud, I think it was actually an ok idea for them to remove it. I mean, for ONE Pokémon you have to program moves, when it learns them, if it learns them through TM, egg group, evolution requirements, what it evolves into, if it has any gimmicks, any forms it has, it's stats, where it spawns, and model its regular and shiny forms and animate them. For ONE Pokémon. Imagine how long that would take with the 1000+ full Dex. Not to even mention all the moves having to be programmed in as well, it's better to just have the 300 average per game so we don't wait 3 or so years per game