I hate to break this to everyone and ruin the family friendly image of Nintendo, but "Cake" is actually an illegal drug. It was first reported on British TV on Channel 4's brilliant documentary series, Brass Eye, about 10 years ago. Just enough time for it to spread to the Mushroom Kingdom. Let's just hope that Peach doesn't develop "Czech Neck"

Check the clip here:

http://www.youtube.com/watch?v=WwylBRucU7w