The first post says 2 per turn/step, so go with that.
Walking around the exact same way on a single seed should give you the same number of advancements, but that's a more clunky way of doing it and requires getting it exact, which is bound to cause even more issues than Chatot did. You can try if you get desperate and don't have a Chatot, but good luck if you do.
Encountering a stationary immediately wil give it your initial PID frame, discounting NPCs of course, so you'd need an advancement. Saving still works as far as I know.
(as an aside, you can use the C-Gear to trade via infrared anytime, anywhere, if you decide to send your Chatot back over real quick)
The musketeers didn't vanish in BW1, so I sincerely doubt they'd vanish in BW2.
EonTimer works as your stopwatch.So I'm guessing it's a little more difficult to attempt to RNG on a 3DS XL? I read somewhere the delay to get into the game is something like 7 seconds as opposed to DS's 1 second, and you need a stopwatch since the 3DS doesn't have a second hand. Is this really necessary if you're using Eon Timer?
Also, is there a guide or helpful posts related to Dream Radar abuse, or will that be on hold until RNG Reporter supports it? The link from the first post seems to be Mac exclusive.
That link is all we have so far. Can't exactly have a guide posted about something that isn't available yet, though supposedly it'll be similar enough that the basics of that guide will still apply.