Reason why he removed it was because it contained elements from Project M which had been canned by the team, and Nebulon doesn't wanna risk himself and the PM Team from getting into trouble incase PM had gotten a cease and desist.
If you're meaning to try and revert the CSS background back to normal, I believe that you'd just have to replace MiscData[30] With a clean version, and just simply add the clone names back in.
If you're referring to the Background KJP. The reason why it's not animated is because it's a static image placed over the Mario Portrait from the Special Brawl section.
I might know what's causing the crash. I believe that White Mage import you're using has renamed bones, which would mean that the PSA is incompatible, as the White Mage that Tyshy uses in the pack is nothing more than a major vertex of Peach, so there's no renamed bones.
Looks like the no name tags over the CSS Icons really came in handy. I don't even think that you'd even be able to ready those nametags even if they were kept with how many fighters that Roster has.
You're welcome and those renders actually make Peach and Daisy surprisingly look more like they'd fit in with the Smash 3 artstyle. I actually might try comparing the two to see if it is, or if you created your own artstyle.
That should definitely be enough 'fire power' for Mario and Luigi. Though hopefully it won't get too 'hot' in the castle for the plumbers with Rosalina, Peach, and Daisy around.