The only Pokémon that is both Electric and Ice type is Rotom when in Freezer form.
You can receive Rotom in pokemon White (The only knowledge I know of now) by trading him for Ditto with a scientist in the game, somewhere after the pokemon league. To get him in freezer form, go to "Shopping mall nine" in the excess- electronics room. Clicking the boxes, if you have Rotom in your party, you can have the choice for him to hold various items: Let him hold the refridgerator,
and now you have the only electric and ice pokemon.
Electric, ice and rock type pokemon.
Rock, electric and ice.
Water/Ice type pokemon are weak against rock, electric, fighting, and grass type moves
The weakness of flying type Pokemon is Ice, Electric and Rock.
Ice Rock Electric