Malachy was a gifted seer. Maybe too right when it cane to the Popes.
And all his "prophecies" are --- typical of fraudulent oracles --- so obscure, that they can be "made to fit" only in hindsight, when you take a handful of known facts, some of them quite trivial, and try to shoehorn them retrospectively into the oracular framework.
The stuff I've read about Pope Benedict XVI being "Gloria olivae" is just snortingly dubious. Strictly in the tea-leaves and chicken-entrails league.