Can narcissists be enlightened?

The short answer is yes, as everyone has the same spiritual structure.  However, narcissists come from the ego so, if they do start this journey, it will be for ego driven reasons.  I have seen this in the past with spiritual healers and psychics, who have found the energy of clairvoyance and healing, they then turned it into something for their own selfish motives, and often go into the dark side which has huge karmic repercussions.  The upside though is that with every lesson, drama, from selfish act etc. enlightenment is possible either in this life or another incarnation.