I intentionally saved my registration just in case I was ever in this kind of situation.
Even if your warranty ran out 6 months ago you could register and the 3 months of registration begins starting from that date.
It is best to save it.
Be sure nothing is left in there though, I left my Wiisports inside and never got it back. :(
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)