Spoilers, I guess. Though if you haven't played Mother 3 yet, chances are you never will. Because Nintendo sure ain't releasing it our way any time soon.
At least we're getting EarthBound. So someone cares.
Mother series icon made by Onyx Oblivian
Foreground Claus image made by Gonzales: [link]
Background Claus image made by ~loppi
Claus and Mother (c) Nintendo/Shigesato Itoi/Ape Inc/Creatures Inc/probably someone else too