The only type that is Super Effective against pure Electric-types are Ground-types, like Marowak.
rock
Bug, Ground, Psychic, and steel
Fighting and Fairy
Steel type Pokemon are weak against Fire, Fighting, and Ground type attacks
a powerful or even weak Pokemon with shadow ball, the type is dark
From my experiences, Rock, Ice, and Dragon. I'm not sure about electricity because altaria is also the dragon type.
flying
Grass, Flying and Rock types.
Electric
rock
ground
Fighting and Fairy
Bug, Ground, Psychic, and steel
Grass
Fire type Pokemon or fire type moves beat electric Pokemon.
Fighting and Fairy
fire type