From the Super Mario Wiki
The Beast Glider (known as the Ghastly Glider in Europe and Australia) is an unlockable glider in Mario Kart 7. It offers no stat boosts in any way, making it a completely aesthetic unlockable glider.
To unlock the Beast Glider, players need to collect up to 5000 coins. However, if players use the StreetPass feature to earn kart parts, the coin amount needed to unlock the Beast Glider will decrease. It is often the final non-golden kart part to be unlocked.
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