Digimon Frontier: Island of Lost Digimon originally released in Japan as Digimon Frontier: Ancient Digimon Revival (デジモンフロンティア: 古代デジモン復活!!, Dejimon Furontia: Kodai Dejimon Fukkatsu!!) is the seventh Digimon film.[13] It was released in Japan on July 20, 2002. It was released in the United States on November 27, 2005.
Takuya and his friends travel through a desert, when they discover a floating continent known as the Lost Island in a civil war between human-type and beast-type Digimon. In the village of humanoid Digimon, Takuya, J.P., and Tommy learn from Kotemon of a legend that the island was protected by their god Ornismon. Kotemon proceeds to take them to a neutral location where his friend Bearmon brought Koji and Zoe after they ended up in his village. After the two sides argue what they learned, Bearmon and Kotemon lead them to a mural of Ornismon with Bokomon deeming the DigiCode to be incomplete. Their peaceful meeting is broken up as Kotemon and Bearmon's older brothers, Dinohyumon and Grizzlymon, appear and battle each other. But after Takuya and Koji spirit evolve to Agunimon and KendoGarurumon to stop them, the respective brothers walk away.
As the human Digimon prepare for battle when their leader d'Arcmon rallies the crowd, Takuya reluctantly accepts Dinohyumon's recruitment offer to allow Tommy to escape with Kotemon. A similar event with J.P. and Zoe spiriting Bearmon occurs at the beast Digimon village as Koji accepts Grizzlymon's offer during a speech by the beast Digimons' leader Hippogriffomon. Zoe, Tommy, J.P, Bokomon, and Neemon help many Fresh Digimon assemble the writing under the mural. But upon its completion, Bokomon deciphers that Ornismon is actually an evil Digimon that oppressed the island before being sealed away by the Ancient Warriors—AncientGreymon and AncientGarurumon. Furthermore, after the group notices a missing piece in the mural that is identical to the ornament both d'Arcmon and Hippogriffomon possess, J.P. and Zoe proceed to inform Takuya and Koji while the others stay behind in hope that they can find an answer to the crisis.
On the battlefield, Takuya and Koji eventually spirit evolve to BurningGreymon and Lobomon to stop the war, but end up getting both sides to turn on them before Kazemon and Beetlemon arrive. The two revealed that on their way, they discovered a horrible secret: the two armies' leader being the same Digimon when catching d'Arcmon transform into Hippogriffomon. Exposed while forced to become d'Arcmon again, the fraud confesses to have been collecting the Fractal Code from the many fallen Digimon to revive and control Ornismon while assuming his true form: Murmukusmon. Overpowering the Legendary Warriors, Murmukusmon guides Ornismon to the murals of AncientGreymon and AncientGarurumon, which begin shining. Kotemon gives his life to protect them, and Bearmon's tears along with Kotemon's sacrifice summons spectral forms of the Ancient Warriors. Their appearance gives the DigiDestined a second wind with the island residents joining them as Agunimon takes out Murmukusmon before the Legendary Warriors destroy Ornismon for good. With Ornismon no more, the Lost Island returns to the Digital World with the two sides finally making peace with Kotemon turning up alive as he and Bearmon have a reunion.
