2023] Eternatus Pokémon-Don't Miss Legendary in Pokémon

In Pokémon Sword and Shield, Eternatus can be found in the Energy Plant located underneath Hammerlocke Stadium. Once encountered, catching it’s pretty easy.

2023] Eternatus Pokémon-Don't Miss Legendary in Pokémon

Eternatus, Villains Wiki

Pokemon Sword & Shield: Can You Have Multiple Saves (And 11 Other

Eternatus, Nintendo

2023] Eternatus Pokémon-Don't Miss Legendary in Pokémon

Pokemon: 10 Things You Didn't Know About The Legendary Eternatus

The Darkest Day Again — The Return of Eternatus VMAX

Eternatus (anime), Pokémon Wiki

Apparently it's about the 3rd Legendary but not sure. : r/PokeLeaks