Wigglytuff recommended defensive moveset

I think you are right...

DPS:
Looking at the defensive DPS listed on the quick moves page, Pound comes out with a defensive dps of 3.45 when you take STAB into account, while Feint Attack maintains 3.95 dps.

Energy:
Even taking into account energy accumulation, Feint looks better. Calculating the defensive attack times from their listed defensive dps, it looks like Pound has 2.54s, giving 7 energy (2.76 eps), and Feint has 3.04s, giving 10 energy (3.29 eps).

Type Effectiveness:
Neither Dark nor Normal have any terrible weaknesses. The strength of Dark against Psychic is a little useful, even.

Summary: Feint Attack looks better in every way I could find to compare them.

EDIT: Oops, I was actually looking at wrong numbers. I'm not sure, Qmike's spreadsheet also list Pound as the better defensive move. At first it would appear that Feint Attack could actually be better, I'll look into the spreadsheet and see if there's something that makes Pound better.