I'm currently updating my sm3dwMove to work with the new characters (which I call PAL characters), but some moves aren't working. After updating, no one can crouch anymore.
A link to the pastebin is here https://pastebin.com/geeWr58m
The "PAL Characters" have been part of SMBX2 since the first release, fyi.
As for the topic at hand, this whole shenanigan looks suspicious to me:
Sounds like all characters will just never be able to press down.