>>18000481>>18000547Pics are from Gen 3 Anime and Gen 3 Manga. Circled is its wings folded, with the Gen 5 back sprite making it clearer that it's folded cloud wings just cover its body (like Xatu)
From Saphire Pokedex:
"Altaria sings in a gorgeous soprano. Its wings are like cotton clouds. This Pokémon catches updrafts with its buoyant wings and soars way up into the wild blue yonder."
>Its wings are cotton cloudsIt's meant to have cloud wings.