Japanese Pokémon Trading Card Game booster pack from the "Night Wanderer" expansion set. The packs are part of the Scarlet & Violet series and feature Pokémon such as Pecharunt ex, Okidogi ex, Munkidori ex, and Fezandipiti ex. 
Each booster pack contains 5 random cards. 
The booster boxes typically contain 30 booster packs. 
The "Night Wanderer" expansion is also known by its Japanese set code, SV6a. 
The set is a Japanese release and is popular with collectors and players.