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Skis are a device in the games Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3; they also appear in its sequel, Yoshi's Island DS. By equipping skis, Yoshi becomes Ski Yoshi.
They are found mainly in snowy or icy levels, and usually at the end of a level; skis more or less share every identical characteristic in both Yoshi's Island and its sequel. Unlike most other vehicles in these games, Yoshi gets skis by entering a hut and emerging on them. Although players cannot change the direction Yoshi is skiing in, pressing makes him perform a jump. Failing to jump over ramps causes Yoshi to roll up into a snowball and roll uncontrollably for a couple of seconds. Skiing sections of a level can last as much as three sections or 'screens' of a level.
They first appear in Level 5-3, Danger - Icy Conditions Ahead, in Super Mario World 2: Yoshi's Island, as well as Level 5-Extra Kamek's Revenge. In Yoshi's Island DS, they appear in Level 4-7 Teeth-Chattering Chill Zone, and 3-Secret A Light in the Dark.
Skis are also a pair of items found in Donkey Kong Country 3: Dixie Kong's Double Trouble!. Funky Kong needs both of them in order to build the Turbo Ski. Both Squirt of Cotton-Top Cove and KAOS of Mekanos hold a Ski in their possession. When each boss is defeated, they will drop their Ski. Once Dixie and Kiddy Kong collect both Skis, they should take them to Funky Kong, for they will be unable to travel any further in the Hover Craft. Once Funky gets ahold of the Skis, he will construct the Turbo Ski, allowing the Kongs to travel up waterfalls, where they can reach new areas such as K3 and Pacifica (in the Game Boy Advance remake).