Successfully complete the indicated task to unlock the corresponding bass:

Beach Life: Successfully complete Co-op mode on the Hard difficulty setting.

Neversoft Skateboard: Successfully complete Co-Op mode on the Expert difficulty setting with a "Five Star" rank on all songs.

PendulAxe Bass: Successfully complete Co-op mode on the Expert difficulty setting.

Successfully complete the indicated task to unlock the corresponding guitar:

Bat: Get a "Five Star" rank on all the songs on the Easy difficulty setting in Career mode.

Distant Visitor: Successfully complete Career mode on the Expert difficulty setting.

El Jefe: Get a "Five Star" rank on all the songs on the Expert difficulty setting in Career mode.

Jolly Roger: Get a "Five Star" rank on all the songs on the Medium difficulty setting in Career mode.

Moon Shot: Successfully complete Career mode on the Easy difficulty setting.

Nemesis 13: Successfully complete Co-op Career mode on the Medium difficulty setting.

Risk Assessment: Successfully complete Career mode on the Expert difficulty setting.

Radioactive: Successfully complete Co-op Career mode on the Hard difficulty setting.

Rojimbo: Successfully complete Career mode on the Hard difficulty setting.

Saint George: Successfully complete Career mode on the Medium difficulty setting.

Tiki Face: Get a "Five Star" rank on all songs on the Hard difficulty setting in Career mode.

When the battle with Lou starts at the end of the game on Expert mode, strum without holding any frets until you lose. At the "Game Over" screen, select "Tutorial". Pick the tutorial for Guitar Battle, and play through it until the "Lesson Complete" message appears. As soon as the next fret board appears, pause the game, and exit to return to the lesson menu. Then, press Red to return to the list of songs. The battle with Lou will be highlighted. Choose the song, and Lou's notechart will now be set to Easy mode. Note: Your notechart will still be in Expert mode, but his will be in Easy mode.