If so I could have some fun with flinching
Yeah.
Even if you can't breed them onto the same zoroark, you can breed Extrasensory onto one and then teach it Dark Pulse from the BW2 move tutors. :)
Yes it can I just checked on Showdown with /learn
Zoroark can learn Extrasensory only when obtained from: gen 5 egg: cyndaquil, nuzleaf, smeargle, spoink, ...
Zoroark can learn Dark Pulse Have fun flinching!