Fun solve even if I know squat about Pokémon.
I am still wondering about the digit clues though!
One nit and one question:
Small nit: in 30A, the clue and entry don’t really agree. “Perfectly unchanging” would work for “STATIC” (both adjectives) but STASIS is a noun. Maybe “equilibrium” or “balance”?
Is there a reason that the title is "Parts Unown" (and not "Parts Unknown")? Maybe theme-related?