Cumulatively, Pokemon Sun and Moon sold about 375,665 copies in Japan between November 21 and November 28. According to the sales tracker Media Create, 197,000 copies of Pokemon Sun were sold during the same period – compared to 179,000 copies of Pokemon Moon. In addition, by counting the two games from the Double Pack, Pokemon Sun and Moon’s total sales as of the second week are 2,281,000 copies.
Source: Nintendo Everything
Pokémon Blog 