eternatus (#890): the gigantic pokemon.
The core on its chest absorbs energy emanating from the lands of the Galar region. This energy is what allows Eternatus to stay active.
It was inside a meteorite that fell 20,000 years ago. There seems to be a connection between this Pokemon and the Dynamax phenomenon.
As a result of Rose's meddling, Eternatus absorbed all the energy in the Galar region. It's now in a state of power overload.
Infinite amounts of energy pour from this Pokemon's enlarged core, warping the surrounding space-time.
Eternamax Eternatus resembles a hand crossed with a serpent. It may be based on the biblical Seven Headed Dragon that, in the Book of Revelation, throws one-third of all stars down to the Earth and is ultimately banished to Earth with the Nephilim, the Hebrew giants, an event that ultimately leads to the end of time. This account may also be the origin of the item Wishing Star and the Darkest Day. It may also be inspired by Ananta Shesha, the king of Nagas in Hindu mythology who is usually portrayed as a giant, coiled serpent with a thousand heads capable of spewing venom and fire, though some depictions simplify his appearance down to five heads. Shesha bears the deity Vishnu on its coils, similar to how Eternamax Eternatus's core is mounted atop its coiled body.