Game tracking service Enterbrain said that the hugely popular system had reached unit sales of 5,019,337 as of 20 January.
Japanese gamers took just 60 weeks to snap up the five million Wii consoles, compared to the PS2 which took 66 weeks.
However, Nintendo fell short of making a new record, as the DS handheld console sold five million units in just 56 weeks.
Moon's dark side is mountainous, rugged and never visible from the Earth
The groundwater basins in some areas of Tehran have been damaged irreversibly
This is the first time that any spacecraft on Mars has recorded air vibrations on the planet
Arctic sea ice is thickening at a faster rate during winter, thus slowing down long-term decline: NASA
But, the seasonal ice growth could only delay the demise of the Arctic ice cap for a few more decades