Vamdemon

The king of Undead Digimon, it was resurrected through the dark arts, obtaining mighty powers in the process. Originally a malicious computer virus that demolished all the data it absorbed, Myotismon gained the ability to reanimate the data it destroyed as malignant viruses. Myotismon has an extremely cruel and cunning personality, and is an insidiously difficult Digimon to destroy. However, it can only make full use of its powers at night. During the day, Myotismon is apparently reduced to only half-strength. Its special move Night Raid commands a swarm of bats to ambush its foes.