Just so you know, ASH can screw up things, your best off manually hexing it. I tried to make an AT with ASH and it didn't work (it worked after a manual hex).
Its fairly easy to find the pointers. Its just a matter of deleting all the PLT0 info, deleting the PLT0's pointer, then editing all the pointers so they point to the right spot.
There is. If you are willing to delete the PLT0 file in her .pac and edit the pointers so its all corrected. As i said, its possible, just annoying and time consuming.
AFAIK, SSBBarc doesn't remove PLT0 files (or edit pointers, but i could be wrong). You can change the image type, but not remove the PLT0 file with just SSBBarc (i have done it with items before, a huge pain in the ass). Not really that useful anyway, you will hardly see a difference.