Wii games are usually in the form of CD's unless you play them directly online, but in most cases you have to purchase a CD so which you can be able to take pleasure in your Wii console. The downside of using a CD is that it's not meant to last forever in as much as durability is concerned. Original Wii CD's will probably seem to have a high high quality, but even if it follows international standards, these games are still prone to deterioration.
The answer to this is that you simply should be able to back up Wii games. When you back up Wii games you will be assured that no matter what happens to your Wii CD, you are able to still play the game on Wii. In most cases, especially if the player usually plays the same CD, that CD tends to deteriorate fast because of the damages it can incur while it is spinning inside the console. The constant and high speed spinning of the CD inside the gaming console can cause scratched on the data side of the disc even if we take care of it, as well as the even more often you play the CD, the way more scratches it will take from the console. Perhaps, after a year, you'll end up with a badly scratched CD.
Aside from this factor, you also have to create a back up for your Wii games in case the something bad happens to it in case of mishandling. If you're the type of player who does not care about the CD that much, the tendency is that you simply might possibly just be placing the CD all over the place once you're done playing with it. This is bad for the CD because it will get additional scratches from rough surfaces than from its spinning in the console. Worse than this, your CD may accumulate dust or other particles that may not just deteriorate the CD but the console itself.
Thus, you should back up Wii games so that you simply can be certain that you simply can still continue playing your games on Wii even if something terrible happens to your CD games. Just constantly remember that the best cure is nothing else but prevention.