Hello the Ooftroop :)

A mi es que los 3 de esa generacion s eme hacen un poco pochos

Opino que no sabes nada y que Popplio, Quaxly y Sobble son la hostia también

Now that it is finally out, I finally have the answer. Blackbird does indeed appear in part 3. Even though he doesn't show his physical form (he would have been too powerful evidently) At least he appears twice in book form. With this knowledge, i can finally rest in paece. Thank you Ooftroop