Lightning Rod is an ability commonly found in Electric type animals.
In Battle Use
Lightning Rod allows animals with this ability to nullify any Electric type moves that comes into contact with them. In addition to nullifying the damage from the opposing Electric moves, this ability kicks in to increase the Lightning Rod animal's special attack stat.
Much like Volt Absorb, this ability likely evolved from animals that have continuously come into contact with Electric moves. However, this ability likely allows these animals to become recharged from the electrical currents as opposed to harming them; thus, removing any harm from the attack and instead benefiting the animals with additional energy.