how do i post pictures here? can i even do that on a 3ds?
Post
i dont know i only have a wii u and i think its only a feature on wii u, i would have to double check
You can do it on 3DS. Suspend a game, Go to Miiverse and go to its respective community. Tap post and there should be a picture icon. (Keep in mind every game may not be compatible)
Suspending a supported game allows you to post a Screenshot of any supported scene. Not sure you can post Photos taken on 3DS though.