Obesity experts today slammed Nintendo after its Wii Fit game told a 10-year-old girl she was fat.
They fear the game could damage children's body image and called on the company to warn parents it is not suitable for their offspring.
The Â£69 game, which sold out within hours when it went on sale in Britain last month, uses an electronic "balance board" to monitor a player's weight.
Once the player has entered their height, the game uses BMI, a measure of body fat based on an adult's height and weight, to calculate their level of obesity, placing them in categories such as "underweight" and "fat".
Players can then be guided through yoga exercises or play games to improve their balance.
However, a father from the South-East spoke today of the embarrassment when his stepdaughter played the game and was labelled fat.
"She is a perfectly healthy, 4ft 9in tall 10-year-old who swims, dances and weighs only six stone," said the father, who did not want to be named for fear of embarrassing the girl further.