I think that pink skunks get a bit big for a 5 gallon they can reach sizes from 4 inches to 6 inches in length , Try to see if there are some other fish that pique your intrest ..... Maybe a gobie of some sort paired with a shrimp would work a bit better This is my opinion I am sure that others will offer you some more advice on them here is a link with there stats :mrgreen:
Most LFS are willing to get something like that in if you ask them to, they aren't really going out of their way or anything to add them to their regular order.
That would definitely make for a more interesting fish. I have a captive bred misbarred false perc. in my 92. It almost seems like some of the time he is trying to keep the misbarred side away from the front of the tank.