Mario Galaxy 2 -sb4e01-.wbfs: Super

Even with the correct filename, you might hit issues. Here is a quick fix guide:

Mario meets Lubba , the leader of a group of Lumas who lost their ship's power. Together, they transform a planetoid into Starship Mario (shaped like Mario’s head) to chase Bowser through various galaxies. Unique Story Features Super Mario Galaxy 2 -SB4E01-.wbfs

When using a USB loader, the software creates a specific folder structure: WBFS/Super Mario Galaxy 2 [SB4E01]/SB4E01.wbfs Even with the correct filename, you might hit issues