You are awesome. Thank you. Gonna see if I get this right and if I don't run into any snags, perfect. I just replaced the common5.pac in the red character select screen with the default Brawl one. Let's see how it turns out.
[EDIT]
OKAY. So THAT didn't work... Let's see...
[EDIT #2]
Here's what I did. I opened up BrawlBox, opened up the common5 pack. From there I exported the char_bust_tex_lz77 file in there which is the default. I opened up the red and black CSS pack itself and from there I went to that file's char_bust_tex_lz77. I right-clicked and replaced that with the char_bust_tex_lz77 file from the default common5 pack I downloaded. Saved and done, I put the files where they needed to be.
I tried loading it up, menu hack worked fine, but I try going into the CSS and it freezes immediately.
This is the normal CSS from the brawlvault I downloaded, so I apparently don't need any other codes.
Is it because I need to remove the Alloys/Giga Bowser/Whatever files? If that is what the other MiscData pieces are anyway...
[EDIT #3]
So I found out that my SSS and Menu work just fine when the CSS is off. As well, I tried just putting on the default common5 pack into the menu2 folder on my SD card as the properly titled CSS file. It froze on me still.
That must have been a bad common5 file or something...
Disregard all of this. I was stupid. I downloaded one CSS initially and it had different CSS's, but the default ones that the other user gives on Brawl Vault are the default CSPs anyway. Man I am dumb. Thanks again.