These two shiny Guzzlord is a Dark/Dragon-type Pokémon that appeared in SM140: Z-Move Showdown!. They are lead by regular Guzzlord.

Can Ultra Beasts be shiny?

These were introduced in Black and White. As a result, any Pokémon before those games can be shiny (barring most events). ... In ORAS, all Mirage Spot Pokémon, including Legendaries, can be shiny. In USUM, all Ultra Wormhole Pokémon, including Legendaries and Ultra Beasts, can be shiny.

What episode is shiny Guzzlord in?

While battling Tapu Koko, Ash and Pikachu suddenly find themselves in an unfamiliar place inhabited by a menacing Ultra Beast known as Guzzlord!