- Death metal drumming in Custom Jam mode
While playing Custom Jam on the rock drums, keep pushed Nunchuk C + Wii-mote A and flail up and down as fast as possible. Also, try Nunchuk Z + Wii-mote B. Doing this will make a blast beat commonly used in thrash and death metal music.

- Bonus instruments
Successfully complete the indicated task to unlock the corresponding instrument:

Harpsichord	Successfully complete the Rock Jam Mastery Lesson.
Timbales	Successfully complete the Rock Jam Mastery Lesson.
Toy Piano	Create a music video.
Clarinet	Finish the first Expand Your Style Lesson.
Cello	Successfully complete the Rock Jam Mastery Lesson.
Harp	Play through The Legend of Zelda theme in the Mii Maestro mini-game.
Guiro	Finish the first Expand Your Style Lesson.
Bagpipe	Successfully complete the Rock Jam Mastery Lesson.
Dulcimer	Finish the first Expand Your Style Lesson.
Galactic Congas	Finish the first Expand Your Style Lesson.
Taiko Drum	Successfully complete the Rock Jam Mastery Lesson.
Harmonica	Successfully complete the Rock Jam Mastery Lesson.
Timpani	Finish the first Expand Your Style Lesson.
Accordion	Successfully complete the Rock Jam Mastery Lesson.
Galactic Guitar	Successfully complete the Rock Jam Mastery Lesson.
Shamisan	Successfully complete the Rock Jam Mastery Lesson.
Galactic Voyage Stage	Finish the first Expand Your Style Lesson.
Galactic Bass	Successfully complete the Rock Jam Mastery Lesson.
Cowbell	Successfully complete the Rock Jam Mastery Lesson.
Reggae Drums	Successfully complete the Rock Jam Mastery Lesson.
Sitar	Create a music video.
NES Horn	Successfully complete level 4 of the Pitch Perfect mini-game.
Hand Clap	Create a music video.
Galactic Piano	Successfully complete the Rock Jam Mastery Lesson.
Recorder	Create a music video.
Latin Drums	Successfully complete the Rock Jam Mastery Lesson.
Flute	Successfully complete the Rock Jam Mastery Lesson.
Djembe Drum	Successfully complete the Rock Jam Mastery Lesson.
Jaw Harp	Finish the first Expand Your Style Lesson.
DJ Turntables	Successfully complete the Rock Jam Mastery Lesson.
Balled Drums	Finish the first Expand Your Style Lesson.
Cuica	Finish the first Expand Your Style Lesson.
Whistle	Finish the first Expand Your Style Lesson.

- Bonus songs
Successfully complete the indicated task to unlock the corresponding song:

Sur le pont d'Avignon	Successfully complete the Rock Jam Mastery Lesson.
September	Finish the first Expand Your Style Lesson.
Wii Music	Finish the first Expand Your Style Lesson.
Woman	Finish the first Expand Your Style Lesson.
Frere Jacques	Successfully complete the Rock Jam Mastery Lesson.
American Patrol	Successfully complete the Rock Jam Mastery Lesson.
Fra, Santurtzi to Bibao	Finish the first Expand Your Style Lesson.
Super Mario Bros. Theme	Successfully complete level 4 of Pitch Perfect mini-game.
Sukiyaki in Handbell Harmony	Successfully complete Do-Re-Mi in the Handbell Harmony mini-game.
Sakura Sakura	Successfully complete the Rock Jam Mastery Lesson.
Over the Waves	Finish the first Expand Your Style Lesson.
Carmen	Play through Twinkle, Twinkle, Little Star in the Mii Maestro mini-game.
Chariots of Fire	Finish the first Expand Your Style Lesson.
Jingle Bell Rock	Successfully complete the Rock Jam Mastery Lesson.
Material Girl	Finish the first Expand Your Style Lesson.
Animal Crossing	Finish the first Expand Your Style Lesson.
Wake Me Up Before You Go-Go	Finish the first Expand Your Style Lesson.
A Little Night Music	Finish the first Expand Your Style Lesson.
Sukiyaki	Successfully complete the Rock Jam Mastery Lesson.
Wii Sports	Finish the first Expand Your Style Lesson.
Animal Crossing -- K.K. Blues	Finish the first Expand Your Style Lesson.
My Grandfather's Clock in Handbell Harmony	Successfully complete Hum, Hum, Hum in the Handbell Harmony mini-game.
Hum, Hum, Hum in Handbell Harmony	Successfully complete O Christmas Tree in the Handbell Harmony mini-game.
Troika	Finish the first Expand Your Style Lesson.
The Loco-Motion	Finish the first Expand Your Style Lesson.
Please Mr. Postman	Finish the first Expand Your Style Lesson.
Little Hans	Successfully complete the Rock Jam Mastery Lesson.
F-Zero	Mute City Theme
La Bamba	Successfully complete the Rock Jam Mastery Lesson.
The Legend of Zelda	Play through Ode to Joy or The Legend of Zelda theme in the Mii Maestro mini-game.
Turkey in the Straw	Successfully complete the Rock Jam Mastery Lesson.
The Entertainer	Finish the first Expand Your Style Lesson.
Scarborough Fair	Finish the first Expand Your Style Lesson.
Minuet in G Major	Finish the first Expand Your Style Lesson.
Ode to Joy	Successfully complete the Rock Jam Mastery Lesson. Alternately, play through The Four Seasons -- Spring in the Mii Maestro mini-game.
Oh, My Darling Clementine	Finish the first Expand Your Style Lesson.
The Four Seasons -- Spring	Play through Carmen in the Mii Maestro mini-game.
Do-Re-Mi in Handbell Harmony	Successfully complete My Grandfather's Clock in the Handbell Harmony mini-game.
The Blue Danube	Finish the first Expand Your Style Lesson.
Bridal Chorus	Successfully complete the Rock Jam Mastery Lesson.
La Cucaracha	Finish the first Expand Your Style Lesson.
Expand Your Style Lessons	Create six videos in Custom Jam mode.
I've Never Been to Me	Finish the first Expand Your Style Lesson.
Long, Long Ago	Successfully complete the Rock Jam Mastery Lesson.
Swan Lake	Successfully complete the Rock Jam Mastery Lesson.
I'll Be There	Finish the first Expand Your Style Lesson.
Every Breath You Take	Finish the first Expand Your Style Lesson.
From the New World	Successfully complete the Rock Jam Mastery Lesson.
Happy Birthday to You	Finish the first Expand Your Style Lesson.
Yankee Doodle	Finish the first Expand Your Style Lesson.

- Alternate costumes
Select Quick Jam or Custom Jam mode. At the 'Begin Playing?' screen, enter one of the following codes to begin a Jam Session with all the Miis in the corresponding costume:

Tuxedo	Keep pushed Up and press Begin.
Dog	Keep pushed Down and press Begin.
Rapper	Keep pushed Up + B and press Begin.
Cheerleader	Keep pushed Left + B and press Begin.
DJ/Clear Boxer	Keep pushed Right + B and press Begin.
Cat	Keep pushed Left and press Begin.
Black Belt	Keep pushed Down + B and press Begin.
Wii Music T-shirt	Keep pushed Right and press Begin.

- Unlockables
Successfully complete the indicated task to unlock the corresponding bonus:

Add/ Remove Parts (Instruments) from songs in Jam mode	Successfully complete the Pop Jam Mastery Lesson.
Harmony High-Rise level	Successfully complete the Rock Jam Mastery Lesson.
Clearboxer	Finish the first Expand Your Style Lesson.
Lessons Section	Create three music videos in Custom Jam.
Music Room in Jam mode	Successfully complete the level 8 in the Pitch Perfect mini-game.
Rapper	Finish the first Expand Your Style Lesson.
Beachside Drive level	Successfully complete the Rock Jam Mastery Lesson.
Singer	Successfully complete the Rock Jam Mastery Lesson.
Black Belt	Finish the first Expand Your Style Lesson.
Cheerleader	Create a music video.
Cat Suit	Create a music video.
Stylize your instruments in Custom Jam mode	Successfully complete the Rock Jam Mastery Lesson.

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