Question

What Pokemon are unobtainable in Legends: Z-A?

Answer 1

Unobtainable Pokémon (Serebii)

Before DLCs and HOME connectivity, there are 791 unobtainable Pokemon in Legends: Z-A. Due to the size of this answer, it makes more sense to just link to Serebii's page on the topic. This could change later on if the answer shrinks substantially.

Comments

I wonder if any of the unobtainable pokemon can mega evolve

---

Not currently, but possibly with the Mega Dimension DLC.

---

Right, the Hoenn Starters aren't in the game. Plus Rayquaza