Digitamamon

Digitamamon appeared in 1999 animated TV show called Digimon Adventure. Digitamamon is a Perfect Digimon. An ultimate Digimon which has the appearance of a Digitama (デジタマ lit. "Digi-Egg"), the beginning and end of all Digimon. It is said that this Digitamamon, being at the apex of evolution, will not evolve from normal Digimon, and will never evolve unless it fuses with data from another dimension. It is covered in an exoskeleton shaped like an egg, and all attacks are rendered meaningless before it. Digitamamon is a creature whose body is hidden inside an eggshell, which is broken in a way that exposes only its yellow eyes and green legs. Its feet have three toes each, and red claws.

In Digimon Adventure 02, Digitamamon has an entire universe inside its eggshell.

In 3-065: Digitamamon, Digitamamon is a ghost-like creature inside the eggshell. It has a red mouth and purple arms with five fingers in each hand.

Attacks
Unison Attacks
 * Enigma (Hyper Flashing)
 * Nightmare Syndrome: Fires a powerful blast of dark energy from the opening in its eggshell which traps its enemies in an endless nightmare.
 * Swing Egg
 * Double Nightmare Syndrome: Fires powerful nightmare energy alongside Tapirmon.