Vamdemon  

Myotismon

Myotismon, also known as the Undead King of Digimons, has a Japanese name that references both vampires and demons, while its English name comes from the Greater mouse-eared bat. This powerful creature was brought back to life through dark magic and gained immense strength. Initially, it was a destructive computer virus that fed on data, reviving destroyed files as malicious viruses. Myotismon's personality is ruthless and cunning, making it challenging to defeat. Despite its abilities, it can only showcase them at night, and its power decreases significantly during the daytime hours.