After you defeat the E4 go to mirage tower with a mach bike just like sky pillar go through the cracks. Once you get to the top you will see 2 fossils take anyone. the tower should then fall. It will say the other fossil sunk into the ground. Go to fossil maniacs house. He should of dug a new cave. Go right till you stop at a dead end in the sand. the other fossil will be there. Go upstairs to the scientists at devon corp. Ask the dude in the back he will take one fossil at a time. Go for a stroll anywhere go back to and he will give you the pokemon that was the fossil. The 2 pokemon should be Lileep and Anorith.