Shadow Claw for Gengar.
Bug Bite for Butterfree.
Pound for Clefable.
Blizzard for Cloyster (though Avalanche is probably better).
Ice Shard for Lapras (mostly for defense; WG/FB are strictly inferior, but this is not as important now since Lapras is more of an attacker/prestiger than a defender).
Dragon Breath for Dragonite (purely for dodgers. DT hits hard, but much harder to dodge with).