Eternatus would be very rare. When summoned, they would fire off a huge laser which would move from one side of the screen to the other. It would be extremely hard to avoid, but not impossible. There would also be a small chance for it to spawn as Eternamax Eternatus, which would fire a bigger laser
Origin[]
Eternatus is a dual-type Poison/Dragon Legendary Pokémon introduced in Generation VIII.
In the climax of Pokémon Sword and Shield the player battles a powered-up form of Eternatus known as Eternamax Eternatus. This form is also briefly seen when it uses its signature move, Eternabeam, but cannot be acquired legitimately in-game.
Gallery[]
Eternatus' model in Pokemon Sword & Shield
Eternamax Eternatus' model in Pokemon Sword & Shield