Digimon Frontier: Ornismon Fukkatsu!!
English title: Digimon Frontier: Island of Lost Digimon
Japanese title: デジモンフロンティア 古代デジモン（オニスモン）復活！！
Alternative titles: Digimon Frontier: Kodai Digimon Fukkatsu!!, Digimon Frontier: Revival of the Ancient Digimon
Type: Movie
Source: Original
Episodes: 1
Status: Finished Airing
Aired: Jul 20, 2002
Duration: 40 min
Rating: PG - Children
Studios: Toei Animation
Licensors: Saban Brands
Genres: Adventure, Comedy, Drama, Fantasy

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)