Digimon Frontier is the fourth anime television series in the Digimon franchise, produced by Toei Animation. Unlike the previous series, the main characters can merge with ancient spirits known as the "Legendary Warriors" to become Digimon themselves.

Digimon , short for "Digital Monsters", is a Japanese media franchise, which encompasses virtual pet toys, anime, manga, video games, films, and a trading card game. The franchise focuses on the eponymous creatures that inhabit a "Digital World", which is a parallel universe that originated from Earth's various communication networks.