Thunder Shock

Thunder Shock, also formatted as Thundershock, is an -type physical move that involves a Pokémon zapping their opponent with a small lightning strike. It is essentially a weaker variant of the move Thunder. The move made its first appearance in Pocket Monsters Red and Green Versions (released as Pokémon Red and Blue Versions outside of Japan). Thunder Shock has Paralysis as its secondary effect, and it has a 10% chance of paralyzing the target.