Generation V
Friend Guard
Reduces damage done to allies.
Detailed Effect
All friendly Pokémon take 0.75× as much direct damage from moves while this Pokémon is in battle. This effect stacks if multiple allied Pokémon have it.
Pokémon With Friend Guard
10 canonical Pokémon forms can have this Ability.

Maushold Family Of Four
Maushold Family Of Three
Clefairy
Jigglypuff
Cleffa
Igglybuff
Happiny
Scatterbug
Spewpa
Vivillon