how do i take in game screenshots and post them here on 3ds?

how do i take in game screenshots and post them here?

do you guys ever just lose your 3ds stylus and tomodachi life is unplayable :(

SPOILER ALERT: So what did everyone think about the mario movie? I thought it was cool, feels cool and weird at the same time to have fox in it. Never would've expected Peach and Rosalina to be sisters! :O