I had the same problem with my old SD card and I asked for help on this forum and also on a computer help forum, and no one could help and they just said my SD card is dead. I got a new one and it works fine. You may have to do the same.
common5.pac > sc_selcharacter > char_bust_tex_Lz77 and all the MiscDatas you see in there are the CSPs for character. Go into any MiscData and click any of the files to see a preview of what CSP it is, then to replace it just open an image up in any image editing program, resize it to the same dimensions as the CSP in BrawlBox, save it as a .png, then replace the one in BrawlBox with it.
You should follow this guide for a more thorough explanation.
the icons had the names of the stage that they were suppose to be... instead of the icon
Maybe you replaced the wrong file in the selmap.pac or you replaced the right file but with the wrong picture. MenSelmapIcon.## is the file that you need to replace if you're trying to put a custom stage icon. MenSelmapFrontStname.## is the file for custom stage names.
Okay, so I have everything installed, and the brawl hacks work very nicely. I just have one question about movesets. I'm trying to get a moveset for Samus, but I'm not sure where to put the motion pac. I want to say it's in the fighters section, but it looks really different than the one in the file on my sd card. Is there another spot to put the motion pac, or is it in the fighter folder?
If you're using common5.pac there is no file size limit. But common5 is only for Riivolution not for Gecko. So this would mean you're using sc_selcharacter and you said it's 3,883 - 3,956 KB which is clearly over 3.79 MB. To lower the file size I would make all your CSPs in CMPR format.
Sorry but, what is CMRP format and how do I make it that format?
It's another format CSPs can use. I don't know anything about Brawl image formats but I know what pictures have to have what formats.
Anyway, CMPR is just less in size than CI8. Using it will lower your file's size. To change any pictures you already have in BrawlBox to this format, just export it, then put it back in again, but when it asks you what format you want to save it in, choose CMPR instead of CI8.
If you're using common5.pac there is no file size limit. But common5 is only for Riivolution not for Gecko. So this would mean you're using sc_selcharacter and you said it's 3,883 - 3,956 KB which is clearly over 3.79 MB. To lower the file size I would make all your CSPs in CMPR format.