Well, a gyroscope is a part where it doesn't matter which one you choose so it makes sense for Nintendo to go with whatever was cheapest at the time. I doubt they would even record which one they used as you can probably see which one is installed, maybe even in software. The company stopped manufacturing those gyros some time ago, but it's just one game and the C-Stick should be enough anyway.Sadly, I don't. Initially I thought there are only 2 types of gyros (just Old3DS vs New3DS). Evidently that's not the case. And at this point, I doubt that anyone really knows the answer except for Nintendo.
Personally I know nothing about gyros, but the one describe here (InvenSense ITG-1010, I believe) is "correct" and expected by my mod. But don't bother, it's not really worth it
On a different note: For Phantom Hourglass, Spirit Tracks, and Ni No Kuni I got the message that Twilight Menu couldn't find any cheats. Spirit Tracks worked before I updated the file because of Ni No Kuni and for Ni No Kuni I changed the text that gets shown inside Twilight Menu to English even before I updated. Is there some way to make them show again?
Also is it possible to combine different usrcheat.dat files?
At the moment I don't need any cheats but I like getting all Pokemon from just one version and it would be nice if I didn't have to swap the files all the time,