Swanna is a white swan-looking Pokémon with large amounts of plumage. It has a long yellow beak with a black cere around it. On its head are several white-colored feathers with a more pointed feature at the top. Just like with most swans, Swanna possess a curved neck. Located on its underside are two light-blue feathery figures that are similar to the ones on its head. Its wings, however, are positioned in a way unconventional to birds. Its legs are small and has dark-colored webbed feet.
Swanna was first seen in a video shown after Oha Suta on July 31, 2010 for the Pokémon Musicals, again when its art leaked on Yahoo's Pokémon website, and finally in the September issue of CoroCoro on August 8, 2010.
It is possibly based on a Trumpeter Swan, as seen by the trumpet it held in a trailer about Pokémon Musicals.
It is also possibly based on Odette from Swan Lake the ballet.
In BW:20 a Ducklett (Swanna's pre evolution) might appear as shown in some preview pictures (in drawing) and in pre release pictures, it shows that with the rumor of Ash getting Sandile in this episode, Ducklett will appear in this episode.
This Pokémon, due to its pre-evolution, appears to be a play on the tale of the ugly duckling, as its pre-evolved form looks like a duck.
Swanna is the first Flying type Pokémon Ash sees in Unova
Officer Jenny has a Swanna that used Defog but did not work in a fog.