Luigi's Mansion: Dark Moon is less than 1GB

[sethnintendo]

Mnementh said:

Devil_Survivor said:
I dont know, maybe they found a better way to compress the data to male it a smaller file compared to the other full retail games on the eshop, dont a lot of them run over 8,000 blocks of data?

Yeah, they did. I copied the data from SD-card to backup them and make a transition to bigger SD. I compressed it with bz2, that is a pretty good compression-algorithm. Probably the best loss-less compression available. It did nearly nothing on the 3DS-data. And as a programmer I know, program-code and data is usually easy to compress, so Nintendo heavily compressed it already.

Doesn't compressing make the audio and visual worse?  I am not too sure.  However, when I used to burn DVDs I would compress movies down to 4.5 GB and you couldn't really even notice any drop in quality of sound or visual (it basically looked the same as the original).