Digimon Frontier: Ornismon Fukkatsu!!
English name: Digimon Frontier: Island of Lost Digimon
Genres: Adventure, Comedy, Drama, Fantasy
Type: Movie, Episodes: 1
Aired: Jul 20, 2002
Studio: Toei Animation
Source: Original
Rating: PG - Children
Synopsis:
The five digi-destined children stumble upon an ancient island inhabited by two different types of digimon; The Beast types, and the Human types. When they see two young digimon-a beast and humanoid-have become friends, they decide something must be done about the feud.

(Source: ANN)