Belphemon Rage Mode is an Evil King Digimon. It is one of the "Seven Great Demon Lords", representing Mars and the sin of Sloth. It is said that Belphemon Sleep Mode awakens from its eternal slumber once in a thousand years. When it awakens, it regains its natural shape and changes into an incarnation of rage, and anything that enters its field of vision becomes a target for destruction. It is said that just by suffering Belphemon Rage Mode's roar, Ultimate Digimon and below will have their data disintegrated and will instantly die, and not even Mega Digimon can escape unharmed.
- Lampranthus: Casts black flames from the chains coiled around its body.
- Gift of Darkness: Unleashes a slash attack from its claws, which are clad in the flames of hell.
- Dark Horn: Stabs the enemy with its two big horns.
- Lightning Horn: Thrusts using an electrified horn.
- Eternal Nightmare: The same attack as Belphemon Sleep Mode but used with great vengeance and furious anger.
Belphemon Rage Mode is derived from the mythological Belphegor.
- Belphemon: Rage Mode (ベルフェモン：レイジモード)
Official romanization given by the Digimon Reference Book and used in the franchise. Some media shorten "Rage Mode" to "RM".
Digimon Data Squad
Digimon World Data Squad
Belphemon is a digivolution in Agumon's galaxy.
Digimon Chronicle X
Digimon Adventure V-Tamer 01 ~New Courage~
Digimon World DS
Digimon Story: Cyber Sleuth
Belphemon RM is a Dark Virus Type, Ultra level Digimon and uses 25 memory. It is a Mode Change from Belphemon SM. Its special attack is Gift of Darkness and its support skill is Furious Howl which has a 30% chance of instantly killing Digimon that are below the Ultimate level.
Digimon Story: Cyber Sleuth - Hacker's Memory
Belphemon RM is #321 and is a Dark Virus Type, Ultra level Digimon and uses 25 memory. It is a Mode Change from Belphemon SM. Its special attack is Gift of Darkness and its support skill is Furious Howl which has a 30% chance of instantly killing Digimon that are below the Ultimate level.
Digimon World Re:Digitize: Decode
Digimon World: Next Order
Belphemon RM is a Fire Virus type, Yellow Mega level Digimon. It DNA digivolves from Belphemon SM and one of Barbamon, Lilithmon or Lucemon SM. Ultra level Digimon can't poop but if Piedmon's experiment maxes the poop gauge, it will digivolve into PlatinumSukamon or Sukamon.
Belphemon Rage Mode digivolves from Belphemon Sleep Mode.
Belphemon Rage Mode is a Burst Mode-level Mercenary Digimon. Belphemon Rage Mode digivolves from Belphemon Sleep Mode, once the "Alarm Clock" has been applied to it.
Belphemon: Ragemode digivolves from Astamon.
Digimon Soul Chaser
Belphemon RM is an Ultra level Digimon that digivolves from Belphemon SM.
Notes and references
- Belphemon Rage Mode is treated as a "Burst Mode" Digimon in Digimon Masters, and as an "Ultra" Digimon in Digimon Story: Cyber Sleuth.
- Digimon Data Squad, "Awaken Belphemon!" 
- Digimon World Data Squad
- Digimon Carddass Battle Terminal 02 (Jump Festa Trailer)
- This attack is named "Dark Sigh" in Digimon World Data Squad