Blue Coin
Blue Coins first appeared in Super Mario 64, and were worth five Yellow Coins each. There are also Blue Coin Blocks; when Mario attempts to Ground Pound on them, the Blue Coins appear near to Mario as the time starts. While Grand Goombas usually give out a coin when punched or stomped on, they will give out a Blue Coin if they were Ground Pounded on. They return in Super Mario 64 DS.
In Super Mario Sunshine, ten Blue Coins can be exchanged for one Shine Sprite. There were 240 Blue Coins in the game, so a total of 24 Shine Sprites could be exchanged for Blue Coins. They do not affect the number of Gold Coins that Mario has collected, though. On a side note, the player receives the option to save their game for each Blue Coin they grab. There are some Blue Coins (as well as Yellow Coins) in Sirena Beach's hotel that are fake since they do not spin and move. They are actually Boos with coins inside of them. If Mario gets too close to a "coin", the Boo will appear.
They appear in New Super Mario Bros., having the same role as Silver Coins from Super Mario Bros. 3, appearing when Mario hits a P-Switch. They sometimes appear in a trail behind Invincible Mario in a few levels, like World 7-3, and in a secret area in World 5-3. They reappear in New Super Mario Bros. Wii with the same function as in New Super Mario Bros.. But when the player collects them all in a level before they disappear, the audience cheers. They are often arranged in patterns.
In Mario Pinball Land, these coins can be obtained by making a combo without using the flipper. Mario can use them to play minigames from Toad for Power Stars.
In Mario and Sonic at the Olympic Winter Games, Blue Coins appear in the Wii version after the player buys the blue treasure chest in the Secret Shop. Getting all five Blue Coins will result in the player getting an emblem. The events that blue coins appear in are Dream Alpine, Dream Ski Jumping, Dream Ski Cross, Dream Snowboard Cross, Dream Short Track, and Dream Bobsleigh.
Blue coins do not appear in Super Mario Galaxy or its sequel, but Purple Coins probably replaced them, seeing as they play the same role as in Super Mario Sunshine, but a requirement to collect one hundred instead of ten.
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