OddishGuy
Smash Journeyman
;_; MFWI believe that perfect waveland causes you to desynch because Popo moves out of Nana's range of control before she would receive the command to airdodge.
For the others, I have no idea. There are two things I can imagine happening:
1. Popo's gravitational pull somehow influences Nana to land a frame earlier or later than she would have normally. Perhaps the strength of his "pull" is stronger on the ground than in the air, so when he lands, Nana begins to fall faster. Or perhaps it has something to do with the orientation of his hurtbox changing when he hits the ground.
2. The event of Popo landing changes some characteristic of Nana, such as the orientation of her collision box, or how the game reads her inputs.
I don't really have the tools to test this out either; however, I did notice that for the "lag/auto-cancel" desynch (where Popo lands in his aerial animation, but Nana lands normally), Nana seems to land a frame earlier than she's supposed to. I suspect the same thing happens when you successfully L-cancel desynch--if Nana hits the ground one frame earlier than normal, and you input L-cancel on the last possible frame, then she'll land before receiving the input, and Popo will act first. Alternatively, if you input the L-cancel a frame too early (so that Popo doesn't L-cancel), Nana will land on the last L-cancel frame, allowing her to act first.
Nana landing a frame early would also explain why the Ice Block desynch works (she lands before receiving the input), but I'm not sure about the "empty landing desynch" (where she fails to jump/wd/run immediately after landing). Another interesting test would be to see if both ICs jump the same height, or if Nana jumps slightly higher or lower due to Popo's gravitational pull.
Sometimes Nana does land a frame early, it depends on jump height and FF timing. you were right about why all these desyncs work.
However, even if Nana doesn't land a frame early, the waveland desync works. Even if it's a miserable, minimum distance waveland. IDK why Nana doesn't do the waveland but she isn't feeling it.
I tried the AC stuff a bit, on SH AC Upair Nana lands a frame early, causing her to miss the AC while Popo gets it. SH FF AC Bair can get Nana to land a frame early depending on the FF timing.
Landing a Frame early is why the landing desync and iceblock desync work as well.
But.... WHY does Nana land one frame early?!? Falling time doesn't seem to matter, falling speed doesn't seem to matter... WTF =[
I retried the L-cancel desync, Nana doesn't land a frame early here. She does exactly what Popo does frame-wise, but she misses the L-cancel. Something else is at work for this one =/
I just want to understand the character I play V_V'