Splatterhorns are rhinoceros monsters with red hides, shaggy manes around their necks, and extra horns on their backs and heads. They can save up their strength to charge at full pelt at opponents and gore them with their horns. Their English name is a play on the word "splatter" and the Matterhorn mountain in the Alps.
The splatterhorns faced in the Tower of Nod are much more powerful than the ordinary variety, having higher attributes, but otherwise have the same abilities, resistances, and item drops.