Belphemon Sleep Mode
(ベルフェモン:スリープモード Belphemon: Sleep Mode)
Belphemon Sleep Mode b
Level Mega
Type Demon Lord
Attribute Virus
Family Dark Area
Debut Bo-1s: Belphemon Sleep Mode
Prior forms Astamon[1]
Next forms Belphemon Rage Mode[2]
Partners Akihiro Kurata
Cards (Ja:) Bo-1s, Dα-276

Belphemon Sleep Mode is a Demon Lord Digimon. It is said to be sealed in the deepest part of the Dark Area. As the strength it possesses is too immense, its data is said to have been put in a Sleep state by the Digital World's system, although the truth of the matter is unconfirmed. Because it has fallen into a deep sleep, it cannot unleash its own attacks, but it is able to inflict damage to Digimon just with its snores, and for that reason it will not be easy to attack Belphemon Sleep Mode in its sleep.[3]


  • Eternal Nightmare: Invokes a nightmare with its peaceful snoring. If you are suffering from a lack of sleep, this technique is encouraged as it promises an eternal slumber.
  • Lampranthus: Casts black flames from the chains coiled around its body.


Belphemon Sleep Mode is derived from the mythological Belphegor, as well as the Second Beast of Revelation and the Tamagotchi.


Belphemon: Sleep Mode (ベルフェモン:スリープモード)

Official romanization given by the Digimon Reference Book and used in the franchise.


Digimon Data Squad

Digimon Masters

Belphemon Sleep Mode is a Mega-level Mercenary Digimon. Belphemon Sleep Mode digivolves from Astamon, and can digivolve to Belphemon Rage Mode once the "Alarm Clock" has been applied to it.

Notes and references