Friend Guard

 is a Pokémon ability introduced in the fifth generation. It reduces the damage dealt to allies. It can only be obtained as a Hidden Ability.

Description
Friend Guard reduces damage to allies on the field by 25%. It cannot reduce damage of moves that do set damage like Dragon Rage, Bide or Sheer Cold.

As a Hidden Ability

 * Clefairy
 * Jigglypuff
 * Cleffa
 * Igglybuff
 * Happiny
 * Scatterbug
 * Spewpa
 * Vivillon

Trivia

 * The ability is almost exclusively known by unevolved Pokémon with Vivillon being the only final evolution with it.