Q. What does "scrubbed" mean?
A. When you hear the word "scrubbed" in relation to Wii games, it's meaning is similar to that of scrubbing or cleaning.
When a Wii game is stored on a DVD, it fills up the full DVD, no matter how large the game files are. All the game files could hypothetically be about 2GB when the DVD takes up 4.7GB. "Scrubbing" means that all the unneeded stuff is cleaned off the game image and wiped away so when the game is stored on your hard drive it doesn't take up the full 4.7 GB. Thus, it allows you to store more games on a hard drive
e.g. If you have a 500GB hard drive and all the files took up the full 4.7 GB, you could only fit about 100 games on the drive.
Whereas when a game is scrubbed (say each gave took up 2.5GB average), you could store 200 games on the drive... or potentially more.