honestly the puzzle isnt very hard, once you understand it.
you have to match the colors of the cracks with the colors of your tiles.
on the right and left side you can alter the order of the tiles.
using the middle coloumn you combine the top (or bottom, depending on which statues are activated) tiles toegether to make a color in the middle
so to start id recommend putting the dark darkest tile on the right at the top. than combine them, to get the black tile in the middle. next you make a dark tile and so forth, so start with the tiles you need at the bottom
Vanitas's post in Giratina light and dark puzzle help plz was marked as the answer