Pairodds are enemies from The Legend of Zelda: Link's Awakening. Upon Link's arrival in a room, they remain stationary and do not attack until he approaches them. When he does so, the Pairodds will briefly disappear, teleporting to a different area of the room. As they reappear, they fire a projectile at Link, which can be deflected with the Shield.
The trick to defeating a Pairodd is anticipating where it will reappear and being there to strike it as it reappears. If Link uses the Pegasus Boots, they can come within range of Link's sword before they ever have time to teleport out of reach; also, they may be defeated outright if Link charges at them with the Pegasus Boots while he has his sword equipped.
The name "Pairodd" may be a reference to the concept of parity in mathematics: Pairodds are frequently encountered in pairs, and when one of the Pairodds encountered is slain, the pair is reduced to an odd number. It is also possible that "odd" is a reference to their physical appearance.