Shining Legends - more shiny Pokémon hunting. Can we pull the Mewtwo?

"Shining Legends is a special expansion of Sun & Moon Series of the Pokémon Trading Card Game.
Shining Legends featured Shining Pokémon, a type of Pokémon with different coloration to what is usual for its species.
Unlike regular expansions, Shining Legends booster packs could not be purchased individually from booster boxes. Instead, they were only made available in various set-related merchandise, the first of which was released on October 6, 2017." (Source: Bulbapedia)