Its back tendrils now curl around its main body. Its entire body glows red in this form, and present at regular intervals across its length are black rings with spikes extending outward. Its body becomes incredibly long and serpentine with most of its body forming a massive coil. In this form, Eternatus's shape drastically changes. Eternatus will also briefly enter this form when using its signature move Eternabeam. If Eternatus absorbs a massive amount of energy at once, it will enter its Eternamax form, becoming far larger in size. Eternatus's gigantic size makes it the tallest known Pokémon to ever exist. It also has a pair of thin tendrils extending from its back, formed from numerous triangular segments. Over its head is a translucent red film held between five long spikes extending toward its body's rear. Its head is triangular in shape and has a pair of white, eye-like markings in the form of three connected circles, as well as a spindly lower jaw with several diamond-shaped teeth. The core can also project its absorbed energy into massive blasts. Its torso is formed from a cage of appendages resembling ribs, and inside is a glowing pink core that serves as Eternatus's energy source, absorbing energy to sustain it. Its main body and tail are long, thin, and resemble a spinal column, and it has four small, thin limbs ending in claws formed from spindly appendages attached at right angles. Its body has a vaguely draconic shape and a skeletal appearance, and is largely dark violet with red highlights. This form is also briefly seen when it uses its signature move, Eternabeam, but cannot be acquired legitimately in-game.Įternatus is a gigantic, draconic alien Pokémon. While it is not known to evolve into or from any other Pokémon, the player battles a powered-up form of Eternatus known as Eternamax Eternatus in the climax of Pokémon Sword and Shield. Eternatus ( Japanese: ムゲンダイナ Mugendina) is a dual-type Poison/ Dragon Legendary Pokémon introduced in Generation VIII.