opening the disc normally only shows a few files with nothing of note in them
you need a deep-diving tool like IsoBuster to find the "AAA/" directory, which has the good stuff
(you can also find these by just opening the ISO in a tile viewer, but it'll be interspersed with junk data interrupting sprites and palettes, to extract the files saves yourself a lot of bother)


AAA/DAT/CARD/		battle cards, 8bpp linear
AAA/DAT/FIELD/SPRT/	sprites, 4bpp linear
AAA/DAT/FIELD/STAGE/	map tiles, 8bpp 8x8 tiled



The FIELD/SPRT/ files all start with a 4-byte index of each sprite entry.
It links to a 4-byte value of how many colours are in the palette - "10" hex for 16 colours.
Then the colours!
Then there's 12 bytes of data; 4 bytes that link to when the graphics start (relative to the index position), and 4 bytes that denote when it ends. The remaining 4 bytes are uncertain, though the third byte is the width of the canvas. 

32C
340 pal
36c gfx


	MACRO INPUT
HXD: Find hex values "10 00 00 00", Ctrl + E and copy address (this precedes all palettes)
TILEDGGD: paste value into graphics and palette offsets. scroll through 10 palette entries, set PageDown to 4px and scroll 16 times. save as, paste address to filename
repeat!