An example is the newer version of the immensely popular series Teenage Mutant Ninja Turtles.

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Although native to north America, it is thought many were bought for children in Britain obsessed with the Teenage Mutant Ninja Turtles TV series in the 1980s and 90s.

BBC: Cornwall

On the flip side, it might seem outrageous to non-fans of the series that " Teenage Mutant Ninja" purists are offended by the new mythos of Leonardo, Donatello, Raphael and Michelangelo.

CNN: STORY HIGHLIGHTS

This will be an update of a first-person shooter game with a plot that revolves around battling mutant humans attacking from outer space - very similar to the aliens in the Halo series.

BBC: Halo 3 character