Fractal Code

The idea of fractal code was used in Digimon Frontier. Known as Digi Code in Japan.

Fractal code is the data that makes up a Digimon and could be obtained when a Digimon was destroyed. It is also the fabric that makes up the digital world itself, as throughout Frontier, as fractal code is leached from the world, large sections of terrain start disappearing. The fractal code of the world is transplanted into other digimon and is able to be released by defeating that digimon and scanning into a D-tector; the D-tector can then release the code back into the world in order to repair the part that the code was stolen from.

The protagonists also have fractal code, as they scan a ring of it through their D-Tector in order to Spirit Evolve, which suggests that anything living in the digital world possesses this code.

The Elemental spirits of the 10 legendary warriors are also contained within the fractal code of both the protagonist and antagonist warriors. When any of them are damaged to a critical level, their fractal code is revealed along with their spirits, allowing their theft. This happens to Zoe and Tommy and results in them not being able to spirit evolve for a period after the human spirits of Wind and Ice are stolen. This also eventually happens to all the enemy warriors, with the protagonists scanning the warriors fractal code and spirits into their D-Tectors.

Mercurymon is one of the Digimon who best demonstrates the absorbtion of Fractal codes. In the manga When Seraphimon was destroyed, Mercurymon was able to absorb his Fractal code, thus resulting in his ability to digivolve into ShadowSeraphimon. The Beast Spirit of Steel, Sakkakumon, also demonstrates the use of Fractal codes, one of his attacks is based on Fractal codes.Rumble blend#1-10 attacks his opponents with an element of one of his spheres(this attack only works if he has absorbed a Fractal code of a Digimon that had the same element of the attack).