The Royal Guards at Canterlot the castle. I know some of them are unicorns and pegasi, but are they really alicorns(a winged unicorn)/Pegacorn(same as alicorn)? I'm not sure, if they were guards then Celestia probably made them alicorns. What do you think? I'm not sure of they're alicorns, since they have never shown as alicorns in the show.