At least some of the oddities present with the joystick are also present with the C-stick, e.g. if you hit up on the C-stick with a vertical value of 181 while the stick is horizontally neutral (i.e. has value 128), Popo alone will usmash. I'd expect behavior to be mirrored very closely, but I'll look into it more.



edit: dsmash works similarly with (128, 75) (I'm just going to use (x,y) coordinates in the obvious way for the sake of typing less henceforth).



edit 2: you can also have Nana alone dsmash if you're initially holding (128,75) and switch to something much smaller vertically; (128, 7) is what I observed and I haven't checked anything else yet. I'd assume you could get Nana to usmash alone in a similar way (or jump alone with the regular joystick, or C-stick OoS).



edit 3: It looks like the C-stick behavior is that (128,y) yields a Popo dsmash for any value of y less than or equal to 75 and a Nana dsmash for any value less than or equal to 74. Probably similar for usmash.



edit 4: behavior is similar horizontally; (192,128) yields Popo fsmashes to the right, (193, 128) yields Nana fsmashes to the right.



last edit for this post: I should mention that you don't need to worry about how quickly you're moving the C-stick, which is a concern with the left joystick.