Super Mario Land 2: 6 Golden Coins is a stand-out title – not just for the Mario franchise, but for the Game Boy as a whole.

Here is Keza Macdonald speaking again with Peter White, on BBC World Service programme, You and Yours, explaining why Mario is just so popular and what makes the original game so satisfying to play.

Which Super Mario games have been the most popular? We've got the top six right here, judging by the games' sales figures.