For every purchase made at the Pokémon Stand vending machines found in Japan,
players get a Serial Code (limited stock) that will provide a random set of Roto Loto items, out of 3 preset sets.
Probably because such vending machines can be found at airports and Pokémon Centers that experience international crowds,
these serial codes are not region locked.
Format Ver.1.0.6-3, Post Updated Date:20180702_2056