Generation Iii
Volt Absorb
Turns electricity into HP.
Detailed Effect
Whenever an Electric-type move hits this Pokémon, it heals for 1/4 of its maximum HP, negating any other effect on it. This ability will not take effect if this Pokémon is Ground-type and thus immune to Electric moves. Electric moves will ignore this Pokémon's Substitute. This effect includes non-damaging moves, i.e. Thunder Wave.
Pokémon With Volt Absorb
13 canonical Pokémon forms can have this Ability.

Jolteon 
Chinchou 
Lanturn
Zeraora
Dracozolt
Arctozolt
Pawmo 
Pawmot
Wattrel
Kilowattrel
Thundurus Therian
Minun
Pachirisu