Okay if the shadow tag litwick is male that's the basis of your problem because only females pass down their dream world ability. However if it is female it should and perhaps you should look up litwick's egg group on bulbapedia. Another thing using litwick, lampent, or chadelure as the father. Plus you can't use ditto to breed DW's ability (you can blame nintendo for that) Also there is a 60-40% chance that it will not have a DW ability.
Ok SuperCharizardMaster like an idiot i forgot 2 breed it and its taking forever, and then i realize that i have a female 1, but i dont have a male 1! Im catching 1 as i type, but i still need 2 breed, so lets trade tommorow at noon central time (GTS -5) PS im so sorry:'(