Don't mean to double post here, but I found the pointer to accessories (Indicated by the highlighter/neon green color):
Each byte pertains to an accessory type as I listed.
I just discovered this so I do not yet know what IDs pertain to what items, but I'll be making a list as I continue to play around with the values (will drop an attachment later).
For certain, Marth's Tiara (Head acc.) has the ID 01.
EDIT: ID text file attached
AccessoryIDs.txt