TomaTito on 25 August 2014
Dev team size by game (...doesn't include development times)
Image was published by Nintendo-Online, they've analysed the development team of the Super Mario series over the last 29 years.
More info here: http://nintendo-online.de/artikel/report/18111/inside-nintendo-47-das-super-mario-entwicklerteam-unter-der-lupe
Any more interesting info can be translated by our German speaking users 
