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Hint movies are short-length video clips that show players hints and tricks in New Super Mario Bros. Wii. Players are invited to Peach's Castle to watch them after going to their first Toad House. Hint movies can be watched at any time by visiting the castle and hitting the block inside. All hint movies can be unlocked by satisfying a certain objective in the level they are associated with, but players must pay Star Coins that they have collected in order to fully unlock them. There may be more than one video associated with a level, and there are 65 hint movies in total.
There are four different types of hint movies. The type of the hint movie is displayed next to the level number on the menu, as well as the price in Star Coins ranging from zero to ten. All 231 Star Coins must be used to fully unlock every hint movie. Hint movies which showcase more exploitable shortcuts or higher difficulty generally have a higher price.