Altaria dances and wheels through the sky among billowing, cotton-like clouds. By singing melodies in its crystal-clear voice, this Pokémon makes its listeners experience dreamy wonderment.
– Pokemon Omega Ruby Pokédex
Altaria has gotten even more floofy when mega evolved, it looks more cloud than bird now. It becomes Dragon/Fairy, which means it loses its weakness to Dragon by gaining an immunity to it. It also means that Mega Altaria does not share any typing with Swablu