you have to be in an app, open miiverse, and then enter a community and press post. an image button should be somewhere near the top righ of your screen

plus its only on wii u currently

Hi so I just saw your reply on my kirby pixel art asking in which app I drew it. I used PixelMaker studio (I'm not sure if its on 3ds as I used my Wii U) :o]

thanks yall! i found pixelmaker studio for 3ds too