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
A flying type Pokemon's weakness is an electric type 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
electric and ice and rock
Electric, rock and ice
Super effective on Electric---Ground Super effective on Flying---Ice, Rock, Electric If you mean super effective on an electric/flying type: rock and ice.
electric, ice, rock
Rock, Ice and Electric type moves.
For his Dragonites (x3), have Ice-Type Pokemon at hand. For Charizard, have a Water-Type Pokemon. For his Gyarados, have a Electric-Type Pokemon. For his Aerodactyl, have a Water-Type as well. The 2nd time you face him: Use Ice or Electric Moves or Pokemon against his Salamence. Use Ice or Water Moves or Pokemon against his Garchomp. Use Ice or Electric Moves or Pokemon against his Altaria. Otherwise, he has a Dragonite, Charizard, and Gyarados. Just read above to know how to handle them.