Kaphotics. You consistently amaze me. Thanks for pointing out that excellent guide.
I know that the PC at the E4 has no RMNPCs, but I'm not quite that far yet. I'm currently saved in the PC in the town just before that. There are two NPCs you can talk to, but I've sat there watching them and they have not moved at all over a matter of minutes. I've also been getting consistent nature/IVs it "seems" (haven't verified seeds/frames because I was at work when I Reset all those times). I think it should be safe to do it in this PC too. Any reason I couldn't?
[edit]
Incase anyone wants to do it in the City just before Victory Road, there are no RMNPCs in that PC either. I just reset and immediately picked up, then reset and picked up after letting it set for 10 minutes and got the same starting frame.
[edit 2]
/me is always looking for the easiest way to do this crap
I've just looked at my first seed, and I could be wrong, but I think I see an easier way to do this. When you pick up the WC without advancing to determine your starting frame, could you look at the "nature shift" for that particular seed, then look at your target frame and determine right then and there what nature you would get without wasting the time of resetting/advancing/checking to see?
Here's what I got:
It calculated the starting PID at Frame 46 (in pic). With 0 advancements I got Frame 48 (highlighted in pic). The predicted nature was Docile (in the pic), but I ended up getting Serious which was the nature predicted for the next frame.
After hitting my seed and doing 19 advancements I ended up landing on my target frame (highlighted in pic). The predicted nature was Brave (in the pic). However, I got Gentle, which was the nature predicted for the next frame.
Do you think this is a pattern we could follow? Check the initial frame with 0 advancements. See how far your nature is shifted for that seed, and then predict what your target frame's nature will be based on that shift?
I'll try it on another seed.
[edit 3]
Tried it on another seed.
Predicted frame 50 as the starting frame. Got Frame 52 IVs with no advancements. Got Frame 53 Nature though (shifted down one frame just like last time). My target frame is 94, which has a predicted nature of Timid. The nice thing is that the next frame has a Timid nature too... so... let's hope I'm right... or at least lucky. :p
[edit 4]
Well, either I got really lucky or I'm right (could be lucky, has happened, a lot).
I hypothesized from my first look that you could predict your target frame's nature based on how shifted your 0 advancement reset nature was. I saw that on this seed my 0 advancement reset nature was shifted one frame down, and predicted that my target frame's nature would be Timid (the nature predicted one frame down from my target frame). I reset, did my advancements, and VIOLA it was Timid.
This could just be luck, but I think it's worth looking into. It could save you the time of doing like 40 advancements (especially if you don't have a chattot on your cart) just to find out you wouldn't have gotten the nature you wanted anyway.