Domestic weekend sell-through for Super Smash Bros. Ultimate Starts at a High 1.3mn Copies, released Dec 7. Super Smash Bros. Ultimate is a fighting game developed in 2018 by Bandai Namco Studios and Sora Ltd. and purely published by Nintendo for the Nintendo Switch.
It is best ever sold the game for Nintendo but except pokemon, it was sold 1.8mn copies but it was not purely released by Nintendo it was also released by the Pokemon company, in that case, we cannot compare Pokemon and SSBU’s selling.
POKEMON VS SSBU
Pokémon is not published only by Nintendo but by The Pokémon Company and Nintendo while SSBU is published purely by Nintendo.
it is not clear how to count Pokémon since it always means 2 different SKUs. Comparing one SKU only Smash outperforms all Pokémon games also most probably as the best selling was Pokémon X+Y and they sold 1.87 million together.