Arcaronmon is the Digimon.
Originally, Arcaronmon is the grotesque fusion of Red Master Baron and the Dark Ocean. Kumon desperately absorbing the Dark Ocean's data due to his mercilessly defeat of hands by Samuel Nakaoka's Fruits Ultima Arms and De-DNA digivolve Ordinemon back into two Fallen Angel Digimon. He become the monstrous humanoid form at front of Samuel Nakaoka the Second, Alexs Nakaoka and Maki Himekawa.
However, Samuel Nakaoka and Maki Himekawa won't give up and protect all worlds which the Mark of the Evolution God activates in order to both Betamon and Tapirmon to Warp Digivolve into their Mega forms without their Digivices. Kumon tries to destroy the two Mega Digimon with the final blow, but MetalSeadramon and Huanglongmon combines their attacks to impale Kumon's chest, fatally wounded him.
Horrified in defeated again by MetalSeadramon and Huanglongmon who Digivolved without Digivice that Kumon ruthlessly destroyed them, Kumon screams Samuel Nakaoka's name and Dark DigiFuse with King Drasil into an berserk, insane and final form of Red Master Baron.
However, in the Shiho Saga re-telling Tri arc, Arcaronmon is removed for a favor of Arcadrasilmon's new design.
Attacks
- Burst of the Dark Zone (Hell Zone of Death Burst) -
- Dark DigiFusion - This attack is used in the dub and use this attack to merge with King Drasil.