ROM Hack [Help] Help locating graphics?

[KamekSans]

Hey all, this is a simple problem, but it's been driving me insane.

So I've been working on a graphics mod for Paper Mario: Sticker Star. I have no problem with dumping/repacking, thankfully. However, I can't for the life of me find possibly the most important textures in the game: the stickers.

I've looked through pretty much everything in the romfs folder, and I've looked at all the files that it could be in, but I haven't even found anything remotely related to stickers, except for the base animations for them (i.e. when they fall to the ground from a ? block, I think). So does anyone know where the hell they are?!

For reference, I've checked everything in these folders:

/ad
/battlemap
/ed
/enemy
/item
/map
/map_piece (it's unused anyway though)
/mobj and /mobj/other (I can't seem to find anything in /mobj/access at the moment)
/npc
/op
/party
/pera
/player
/robj
/shared
/ui
​

...which is essentially the entirety of the romfs/Graphics folder. They may be in a different folder in the romfs, but I've done a thorough investigation haven't turned up anything.

So if anyone could at least point me in the right direction, it'd be really appreciated.