It seems there are quite a few people who are having disc reading trouble for Xenoblade Chronicles. Well, Nintendo Support has a page for you that better describes why it might happen and what you can do about it.
Nintendo Support 

Ryan Tyner
Ryan is an owner and manager of the oprainfall website, mostly managing changes needed for the website and maintenance. He also writes articles from time-to-time. His gaming interests include mostly RPGs; both Western and Japanese. Ryan has a graduate degree in psychology.
https://www.facebook.com/ryan.tyner.in.az

Related Articles
Japan News News

Nintendo Releasing Pokémon OR/AS Plushies

Colin Malone
[caption id="attachment_163424" align="alignnone" width="610"] PLUSHIES![/caption] The Pokémon Company has been no stranger to merchandizing their most famous brand over the
Tomodachi Life: Living the Dream | September Direct Trailer Screenshot
Channels News Switch

Nintendo Direct: Tomodachi Life: Living the Dream

Jenae R
During today's Nintendo Direct, Nintendo showed off more footage of their upcoming new Tomodachi Life game. Tomodachi Life: Living the
Android iOS News

Demons’ Score Opening Cutscene/Tutorial Demonstrated

Kyle Emch
Square Enix recently uploaded the opening sequence and tutorial for an upcoming mobile game for iOS and Android called Demons’