6 species have Lightning Rod as a hidden ability, 11 as a normal one

Effect, in PokéAPI's words

“Redirects single-target Electric moves to this Pokémon where possible. Absorbs Electric moves, raising Special Attack one stage.”

As a hidden ability

Species	Slot	Note
Pikachu	Hidden	Since Generation V
Raichu	Hidden	Since Generation V
Goldeen	Hidden	Since Generation V
Seaking	Hidden	Since Generation V
Pichu	Hidden	Since Generation V
Plusle	Hidden	Since Generation V

As a normal ability

Species	Slot	Note
Cubone	Normal
Marowak	Normal
Rhyhorn	Normal
Rhydon	Normal
Electrike	Normal
Manectric	Normal
Rhyperior	Normal
Blitzle	Normal
Zebstrika	Normal
Togedemaru	Normal
Pincurchin	Normal

Held in earlier generations

Species	Slot	Note
Zapdos	Former	Through Generation V

Elsewhere in PokéAPI

20 more holders without a page here

Alternate forms and other species that PokéAPI lists with Lightning Rod.

Sceptile Mega, Pikachu Rock Star (hidden), Pikachu Belle (hidden), Pikachu Pop Star (hidden), Pikachu Phd (hidden), Pikachu Libre (hidden), Pikachu Cosplay (hidden), Pikachu Original Cap (hidden), Pikachu Hoenn Cap (hidden), Pikachu Sinnoh Cap (hidden), Pikachu Unova Cap (hidden), Pikachu Kalos Cap (hidden), Pikachu Alola Cap (hidden), Marowak Alola, Pikachu Partner Cap (hidden), Marowak Totem, Togedemaru Totem, Pikachu Starter (hidden), Pikachu World Cap (hidden), Pikachu Gmax (hidden)