Pokémon X/Pokémon Y become fastest selling 3DS game

PR Email wrote:
   Pokémon X and Pokémon Y recently became the fastest-selling video games for the Nintendo 3DS system, selling nearly 12 million copies worldwide since their October 2013 launch and adding to the more than 245 million Pokémon video games sold to date.

This should be no shock since Pokemon is Nintendo's second best selling franchise.

Pokemon would be Nintendo's best selling franchise if there were as many games as there are Mario. But it's not just the fastest selling 3DS game, it's also the best selling game as well. Wasn't Animal Crossing: New Leaf previously the fastest selling 3DS game though?