How does Dwebble “melt holes in hard rocks with a liquid secreted from its mouth” without any acid based attacks?
…huh.
Y’know, that…
…huh.
Okay, well, I suppose my stance has to be that, If I Were In Charge, Dwebble would get Acid because it makes sense and there’s no compelling game balance reason for him not to, but given that he doesn’t… Upon closer inspection, the Pokédex never actually says “acid” or “acidic,” it just mentions a secretion from Dwebble’s mouth – so maybe it’s not an acidic solution at all, but a special enzyme in Dwebble’s saliva, designed to break down certain kinds of rock? It’s slow-acting, ineffective against all other materials, and therefore utterly useless in combat, but important for Dwebble’s way of life. I think that makes sense.