The Water Skip is an ability exclusive to Kiddy Kong in Donkey Kong Country 3: Dixie's Double Trouble! and Donkey Kong in Donkey Kong Country: Tropical Freeze. This ability lets them bounce on water to reach far or high places where the other Kongs could not.
To use this ability, press Y to make Kiddy roll off of a platform and press B before he hits the water to make him bounce; he can bounce twice in a row. The second hop will be higher than the first.