Fan:Digimon AX

Digimon AA, also commonly written as Digimon Double-A, Digimon Alternate Adventure, or unofficially Digimon Adventure 03, is a fanfictional Digimon series & partial sequel to Digimon Xros Wars. The series focuses on a group of alternate versions of the original DigiDestined in the sixth seasons.

Plot Summary
Multiple armies are fighting for dominance of the Digital World.

Other characters

 * Omnimon: The leader of the Digimon that attempted to prevent the splitting of the Digital World. His DigiMemory ended up in Shibuya. He is an ancestor of Shoutmon.
 * Penguinmon
 * Whamon
 * AncientGreymon and AncientGarurumon: Two legendary warriors that attempted to prevent the splitting of the Digital World, along with Omnimon. Their DigiMemories ended up in Shibuya. They are an ancestors of Gumdramon.