Zapdos

Zapdos (Japanese: サンダー Sandaa) is a /-type Legendary Pokémon introduced in Generation I.

In the anime
Zapdos first appears in the anime in the episode Land of the Giant Pokemon.

Name pun
It is possible that the last part of each birds name are puns, because the last syllable of each of the Legendary Birds is a number in Spanish (ex. Articuno, Zapdos, Moltres). Zapdos would then be the second Legendary Bird of the trio.

Trivia

 * Zapdos, as depicted in an ancient legend, is the titan of lightning.
 * Zapdos appears to have two sets of wings, stating it has a black part and a yellow part.