It strips away the unused "dummy" data that fills up the dual-layer disc, leaving only the playable game code.

When searching for the best way to shrink Brawl, not all formats are created equal. 1. RVZ Format (The Gold Standard)

You're looking for a highly compressed version of Super Smash Bros. Brawl!

When you encounter "highly compressed" or "scrubbed" versions of Brawl, you are usually looking at one of three things:

Avoid the "ultra stripped" 1.5GB versions unless you are running a netbook from 2010. The RVZ strikes the perfect balance between saving hard drive space and preserving the epic, cinematic experience that made Super Smash Bros. Brawl a legend.