HOW DOES ONE TALK TO OTHER PEOPLE IN KID ICARUS UPRISING OR IN SUN AND MOON

i have a idea.

....maybe

if i can figure out how to communicate to people on the 3DS besides just putting messanges on your profile so others can see it along with that person

if you look at the top pic you'll know exactly who im talking about

on my ds i checked his activity before i went to bed and it said 5 hours ago.

so im gonna try