Thank you for replying, Achilles (and thank you for making the 20XX pack and replying so thoroughly to everyone in this thread).
Earlier in the thread you said that the "FLASH NO L" toggle should save onto the memory card. This doesn't happen for me. I can get some things to save, and other things won't save at all; trophies save, debug mode toggles don't, versus mode records did save at least once (since I have a record of 3 matches taking place) but have not saved for a long time. I can't remember what other things save so I'll check and edit it in.
I'm using a new save created when I first started the 20XX pack, on an otherwise blank memory card purchased in Europe on a PAL Wii (though the Wii has a region-free hack), although I don't imagine there are any differences between memory cards in different regions. I have tried going back to the menu and then to the start screen to make the game save but that didn't seem to work.
I would also like to know whether saving while using the 20XX pack to a memory card that has a PAL Melee save on it will break anything.
Also, I have a few more bugs to report but they haven't happened often enough for me to really be able to tell what's going on:
• At some point when playing a CPU Fox with in-game codes turned off, while the Fox was in the air (it may have been just as it left hitstun, I can't remember), it spontaneously teleported onto the ground next to me and started dashing back and forth inside of me (like what happens sometimes with the action states). It looked almost exactly like a save state was loaded despite the toggle being off and me not doing any of the inputs to save or load.
• Again when the in-game codes were turned off and I didn't try to use any of them anyway, after a Fox was knocked down, instead of getting up in place and shining it got up and started doing short hopped aerials and missing the L-cancels until it was hit, at which point it would start acting normally again. It was a few weeks ago so I can't remember whether it was doing it in place or moving across the stage, nor whether it shined or not. Once this started it didn't stop until I quit the match (though occasionally after knocking it down again the actions would be slightly different) and hasn't happened again since.
Bugs that have happened more often and consistently:
• CPU Foxes knocked offstage will quite frequently shine, then immediately jump cancel it and then air dodge down (causing them to die) when they get out of hitstun.
• CPU Foxes knocked offstage will occasionally shine repeatedly when they get out of hitstun until they fall to their deaths (this happens more rarely than the first point).
• CPU Foxes knocked offstage will occasionally repeatedly shoot lasers when they get out of hitstun (this seems to be slightly rarer than the second point).