DigiMelody

A DigiMelody is a short piece of music that represents a Digimon's data.

Within Digimon Fusion, DigiMelodies are produced by Digimon who are slowly dying, and can come in various colors.

After witnessing strange events happening in the city, Mikey Kudo heard the sound of the DigiMelody for the first time. He had seen a dying Shoutmon whose data was fading away.

After returning to the human world, Mikey, Jeremy, and Angie discover Omnimon in the same place they met Shoutmon. Omnimon told them about the history of the Digital World, and that he wanted to find a person who would capable of listening to the cries of the Digimon's DigiMelody and come to answer them.

Upon being absorbed by NeoVamdemon, Shoutmon and Lopmon could hear MetalGreymon's DigiMelody. Shoutmon argued with MetalGreymon to return back to the battlefield, until both of them made a promise to Lopmon to defeat NeoVamdemon no matter what.