These are citizen ranking/Landroll Ranger license unlockables late in the game achieved through certain tasks.
Win 100 battles in the Intelligent Sea server room.
A wallpaper is a background graphic for the OMP and shop menu's. Once you have more than one wallpaper, you can change between them by going to 'Settings' under the 'Other' menu in the OMP. Most are easy to find, while others are very rare.
To obtain wallpaper 10:
1) Make your way to Intelligent Sea and go to Bravo. Take the Residential elevator up one level (6F) and enter door 1 (left of the shop) and you'll meet a guy named Kamaro. Talk to him to become friends. He'll tell you about the Shouprieme flower.
2) The left entrance at Rock Castle leads to the Sky Cave. Exit the top left and you'll be on a scenic bridge. The next cave to your left will be Rock Castle Spirit Altar. Go to the left and make the first right turn and before you turn left again, you'll see a very large (very out of place) blue flower called a 'Shouprieme'. [Here is what it looks like, and here is where it is.] Press the action button to grab it.
3) Go back to Kamaro's room at Bravo Residential 6F Room 1. Talk with him a few times, and he'll notice you have the Shouprieme. If you give it to him when he asks for it, he'll give you this wallpaper in return.
A wallpaper is a background graphic for the OMP and shop menu's. Once you have more than one wallpaper, you can change between them by going to 'Settings' under the 'Other' menu in the OMP. Most are easy to find, while others are very rare.
To obtain wallpaper 4:
1) Complete the first delivery job you receive from Fredrick in Paradiso Bungalow 5. It's called 'Deliver Mail' in the Jobs list.
2) Talk with Mable at Paradiso in the cafeteria room under the pod station. On your third job for her, you'll need to return to the room you first started in. Here are the directions:
Take the elevator in the Tokione Pod Station, cross the room to the left door, down the steps, and the next door takes you to B1 Center Aisle. Go around the corner, first door on your right after the elevator, into the License Control Center. Go down the elevator beside the orange 'refresh' stand. Take the blue walkway on the left to the up elevator beside the Exit Ride sign to Starhouse B1 and go through the door. Take the left elevator to the Admin Tower and continue up elevators to 5F Admin Room. Go up the stairs on the right to the room you first awoke in.
3) Press the action button on the trash bin that's near the bed against a wall. You'll smell something 'lavender', and receive the wallpaper.