This article is within the scope of WikiProject Dance, a collaborative effort to improve the coverage of Dance and Dance-related topics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Pas de Deux is merely a derivative of what is known in ballet as the Grand Pas, which can take one many different forms - Grand Pas d'ensemble, Grand Defile, Grand Ballabile, and so on.
The Pas d'ensemble can take on many forms, for example the so-caled Pas de Six from the first scene of "The Sleeping Beauty", the Pas de Dix from "Raymonda", or the scene "The Kingdom of the Shades" from "La Bayadere". Likewise the Grand Ballabile can take on many forms, such as the scene "Le Jardin Anime" from "Le Corsaire".