So I've more recently began hacking SSBB through the SD card method, and I'm loving it.
I've almost completely replaced Sonic with Shadow, and I made a Shadow the Hedgehog icon to replace the default sonic face icon. But however, it only seems to work on the CSS. If you're confused as to what exactly this is, it's the logo behind the percentage counter on the HUD - Super Mario Bros characters all have mushrooms, Zelda characters have a Triforce, Pokemon characters have a Pokeball, and Sonic has his head.

What file are those under? I've searched high and low, and I've yet to find it. I've gone into the common5.pac, the select screen file, the select map file, everything. Unless it's under something other than textures, I'm not sure where to look. Google hasn't helped much either.
I appreciate any help that anyone can provide, and I apologize if this topic already exists - just point it to me and I'll ask there. Thanks!
-MugenOverlord