From RWP Wiki
Slippa is a baddy in the Donkey Kong series.
Slippas are large orange coral snakes with black and white stripes.
In the Games
Donkey Kong Country
In Donkey Kong Country, Slippas make their debut. They are commonly found in oil drums. They have no formal attack other than to slither into Donkey and Diddy Kong to damage them. Slippas can be defeated with a roll, a jump, or a thrown barrel.
Donkey Kong Land
In Donkey Kong Land, Slippas reappear, identical to their previous appearance, although they now appear from baskets instead of oil drums.