Forced arbitration or class-action waiver
You are agreeing to give up the right to bring a class action lawsuit against Nintendo.
“ANY SUCH ARBITRATION SHALL BE CONDUCTED BY THE PARTIES IN THEIR INDIVIDUAL CAPACITIES ONLY AND NOT AS A CLASS ACTION OR OTHER REPRESENTATIVE ACTION, AND THE PARTIES WAIVE THEIR RIGHT TO FILE A CLASS ACTION OR SEEK RELIEF ON A CLASS BASIS.”
What that means: You cannot join a group lawsuit against Nintendo, even if many users are affected by the same issue.
The terms mandate that all claims must be resolved through individual arbitration administered by the AAA, explicitly banning class actions.