How do you get past the puzzle then beat Cyrus and get Giratina?

in order to solve the puzzle in the distortion world, you have to have the hidden move strength, you have to go find the boulders and push them off of the edge. then go back to where mesprit, uxie, and azelf are and move the rock into the purple\black hole in front of each Pokemon. then the Pokemon will leave , next you have to go and find Cynthia, she will tell you to follow her. you will have to battle Cyrus one more time (in the distortion world) and then you will meet giratina. you can flee, catch, or knock out giratina. (you catch him at level 47). then you go back through the portal and you end up in sendoff springs! hope this helped!