>>26875156Pikachu line is 3 slots.
Caterpie line is 3 slots, but also means that we'll have Weedle, which is another 3 slots.
Ledyba line is 2 slots, but also means that we'll have Spinarak, which is another 2 slots.
Meowth was spotted in a release video in the OW, so that's another 2 slots.
Salamence was in the Zygarde video, so that's 3 slots.
In the Magearna reveal we had Krookodile (3 slots), Pangoro (2 slots), and Eevee (9 slots).
Right there, from those videos that we've seen, we have 32 pokemon confirmed from old regions appearing.