The D-Frag, short for Digi-Code Fragment, is said to be a piece of the Universal Source Code, a program that is at the base of all Digital Words. It allows Gazimon to become Gazillionmon. It is unclear how it charges, but it seems to be related to how many times Gazimon evolves into other forms. The DigiMoji on it reads “Itsumo” which means “Always.”
