Spear Knight are enemies that have appeared in A Link to the Past.
A Link to the Past
The Spear Knights are the spear variation of the Knights. They are wearing a red armor with horned helm, and wield tridents as their weapon. Spear Knights are commonly found around Hyrule Castle and the Graveyard after you defeated Agahnim. Instead of charging at Link; they just throw their tridents at him, and then backing off to attack again. They can be dealt with by slashing them with the sword or using arrows.
Spear Knight's sprite from A Link to the Past.