Hi
As you can see more and more people are downloading games online down. So that "illegal" is a relative word and can't be 100% sure!
i also want to added about the downloading, copy and backup service: There are serveral sites providing such download services. They are very excellent on the contents, not only Complete big Wii games like Metroid, Super-Mario and Guitar Heroes etc. But also many movies, Wii tv shows, music and videos much more!All you need is to join one of those sites to download so many resources. So you can download all those media as you wish!While it can't be Free. Think about it! People need capital to run more and more resources for you! Just a little money can be valueable for you to download all those abundant resources!
Illegal isn't a relative word. Any website offering copyright material without the express consent of the copyright owner is operating illegally. The games and particularly the music industry are becoming far more pro-active about monitoring, identifying and prosecuting people who redistribute games and music illegally online.
We do what we do so its difficult to discuss it without being hypocritical, but in terms of old games, it is generally not worth the cost of prosecuting people where no-one is actively making (or losing) money from it...this however doesn't make it any more legal than downloading the latest Wii game.
In terms of services offering current comercially available games, music or anything else without the copyright holders consent its no different legally than going to a games store and sticking the latest game inside your jacket and walking out with it. My advice would be don't do it. If its available in the shops, support the industry and buy it, if you can't afford to buy it then its really up to the individual wether they are happy to commit theft or not.