The two Fire Emblem Fates titles achieved combined sales of 300,000 units in their first three days on sale, prompting Nintendo to declare it the best ever launch for the series in North America.
It revealed that Fire Emblem Fates: Birthright was the top seller of the two, with Fire Emblem Fates: Conquest "coming close behind." Together the games sold more than five times as many units as 2013's Fire Emblem Awakening.
"Both fans and critics are falling for Fire Emblem Fates, and the early sales numbers prove the game's undeniable appeal," said Nintendo of America's Scott Moffitt.
"This strong momentum for Nintendo 3DS is only the beginning, as many more high-quality exclusive games are set to launch for the hand-held system over the next few months."