Sneasel Update!
Well, after having a flaw in my planning and getting four 5IV without Speed (that's fine, they're options, just didn't get any other 5IVs then), I finally got the mistake ironed out and, over this afternoon, bred over two boxes of Eggs without checking any (though three did hatch prematurely). Just now, I started to hatch and check them.
The fourth Egg I checked (eighth overall) was a perfect Sneasel with Beat Up/Ice Shard/Fake Out/Feint Attack. I don't know what happened to Icicle Crash. Apparently, the two Sneasel I used were ones that were not bred with the move.
I feel completely sick ATM, as you can probably guess. So I have to train another male and female later (this time looking for one without the 31 in Special Attack as a mate), but this time, I know one will have the move. I will not give up on this Sneasel!