There are two abilities that Pikachu can learn to help it win battles.
Static – When you use this ability in battle, there is a 30% chance that an attacking foe will become paralyzed. It can even affect Ground-type Pokémon.
Lightning Rod – It forces all single-target Electric-type attacks and Thunder Wave to strike the Pokémon with this Ability in Double Battles including attacks used by allies. In a Single Battle, it will cause the Pokémon with this Ability to always be hit by Electric-type moves.