I've noticed some unusual and hidden things with the 3DS, whether they have been intentional or unintentional, so I decided to post them here. Here they are: 1. "Inverting" the 3D effect: This was an intentional discovery I noticed while seeing how the 3D works on the 3DS: if you look at the 3DS the correct way, then turn it on the y-axis (A.K.A yawing it), and you can inverse the 3D effect (i.e. make the objects that are far away look close and vice versa). 2. Using the native resolution for the DS games: When you play a DS game, if you click the icon for it on the HOME menu, then hold in L, R, START, and SELECT, it will be displayed in the DS game's native resolution. I can't really explain it in words, so I will with some visual aids. In this grid, if you use the heavy-lined squares for coordinates, and you want to go to (2, 3), it would be the big square in the middle of the top row. If you used the light-lined squares for the coordinates, however, it would still be in the first big square, on the middle of the small row on the top of the big square. Think of the light-lined squares as the 3DS' pixels, and the heavy-lined squares as the DS pixels; if you wanted to draw a plus sign using coordinates for that grid, it would be smaller using the little squares, and bigger using the big squares. 3. Preserving the AR cards: If you want to prevent the AR cards from getting messed up, you can use a phone (preferably a smart phone) that can browse the internet and save images off it and use these links to put them on the phone's album: the Pikmin card, the ? card, the Mario card, the Kirby card, the Link card, and the Samus card. 4. "Look after our planet." When you complete all of the AR games, if you buy the globe, you can shoot it with those marbles/pebbles. If you keep shooting it, it will get red, then eventually explode, sending rocks flying. Be careful, though, since you have to buy it again if you do this! 5. Centering and leveling picture frames, surfaces, pictures, or anything else: On the 3DS' camera, if you press down on the D-pad, a thing will pop up that tells you where the center of the screen is and if you are holding the 3DS parallel to the ground. I've actually used this to check if a picture frame was level (it wasn't), and to see if the desk in my room was level (it was). 6. Playing Game & Watch: Ball and a SNES Starfox-esque game on audio visualizers: On the "3DS Sound" channel, if you are listening to some music, you can change the visualizer on the top screen to play "Game & Watch: Ball" (which you control with the Circle Pad) and something similar to the SNES "Starfox" (known as Starwing to Europeans), which you control by using the Circle Pad to move the aircraft and the shoulder buttons to fire your laser (no pun was intended; that's just how I started typing it). —Originally posted by Dragonwarrior and Aussie2 7. Forcing the 3DS into Sleep Mode: If you put a magnet behind the bottom screen, to the right of it, with the north side facing up, it puts the 3DS into Sleep Mode. You can get it out of Sleep Mode by placing the magnets away from the 3DS. It doesn't harm the 3DS (to my knowledge, at least), but don't do it often, just in case it could. 8. Viewing cross-eye 3D images without glasses and without crossing your eyes: I found this one out last night: if you take a picture of a cross-eye 3D picture (the farther away the picture is taken, the better you can do this), then realign the images so one image is overlapping the other. Make sure the little circle on the bottom left part of the top screen is not on the left half of the line, then focus on the screen itself, not "behind" the screen. This part is tricky, so you might want to put your finger right in front of the screen, focus on your finger, then, while still focusing on the spot where your finger was, remove your finger from that spot. Also, if you can, print the pictures out on a piece of paper so you don't have any other distractions that might make you focus the way the you "should" (the way that makes you see the two pictures as if they are behind the screen). It's kind of hard to describe it, so if you don't get it, post a message saying that and I'll try to use pictures to explain it. If you do it right, you can view any cross-eye 3D picture without crossing your eyes! If you want to, you can post more and I'll edit it into this message (obviously with credit to the person), but I tried not to post ones that have already been posted on this forum!