You seem to be lacking Dark-type moves. You should get yourself a Tynamo or a Pawniard. Tynamo evolves into Eelektrik at level 39, and then it can learn Crunch. Eelektrik evolves with a Thunderstone into Eelektross, which needs Heart Scales to learn Discharge and Crunch. Pawniard, on the other hand, has Defiant in case its stats get lowered.