At the main menu on the gutiar type in blue, orange, blue, yellow, blue, orange, blue, yellow. Then a confirming message on the screen.

For the air guitar(guitar goes invisible)press
Yellow,yellow,blue,orange,yellow,blue
At the main menu

When using the ordinary controller, press triangle and square at the same time repeatedly

How to beat every song:
First go to practice mode then choose your best song, put it on expert, choose your best section, then play it, then at the end, while it's still rolling, unplug the guitar 1, then, hit resume. Do it ten times, then it rolls forever. Then hit exit, then choose any song on career expert then you''l play the song you chosen on practice except you will only play the part you chose! It will say you've beaten it and if you hit all the notes you'll have golden 3 stars. Here is how to turn it off:
Reset the consle!!!!

These are the only cheats for this game, I've tried all the cheats out there, and only these work.

Unlock ALL:
Blue, Yellow, Orange, Red, Orange, Yellow, Red, Yellow, Red, Yellow, Red, Yellow, Red, Yellow.

Unlock Air Guitar:
Yellow, Yellow, Blue, Orange, Yellow, Blue.

Unlock Eyeball Head Crowd:
Blue, Orange, Yellow, Orange, Yellow, Orange, Blue.

Unlock Monkey Head Crowd:
Orange, Blue, Yellow, Yellow, Orange, Blue, Yellow, Yellow.

Unlock Flaming Head:
Orange, Yellow, Orange, Orange, Yellow, Orange, Yellow, Yellow.

Unlock Horse Head:
Blue, Orange, Orange, Blue, Orange, Orange, Blue, Orange, Orange, Blue.

Unlock Hyper Speed:
Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow.

Unlock Performance Mode:
Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow.

At the main menu, press the buttons below to get the corresponding effect;
Air guitar mode:
Yellow, yellow, blue, orange, yellow, blue

Performance mode: (BEWARE: This takes away the fret board)
Yellow, yellow, blue, yellow, yellow, orange, yellow, yellow

Hyper speed mode:
Orange, blue, orange, yellow, orange, blue, orange, yellow

Eyeball head crowd:
Blue, orange, yellow, orange, yellow, orange, blue

Monkey head crowd:
Orange, blue, yellow, yellow, orange, blue, yellow

Flaming head:
Orange, yellow, orange, yellow, orange, yellow

Horse head:
Blue, orange, orange, blue, orange, orange, blue, orange, orange, blue
Unlock all: (BEWARE: This erases your game data, so take out your memory card first)
Blue, yellow, orange, red, orange, yellow, red, yellow, red, yellow, red, yellow, red, yellow, red
And there you go. All the cheats for this game.

To get the grim ripper to play guitars other than the sythe in career mode, first pick any character apart from grim. Then choose what guitar you want him to have (gibson sg flame finnish looks cool with him!) and then change character to grim. It should say at the top:

Featureing
Grim Ripper
Playing the
Gibson sg flame finish (or whichever guitar you chose)

Then play a live show... And the grim ripper will be playing your guitar of choice! To change it back to the scyth, just go to change guitars. This can also be done the other way round: Pick the grim ripper as your chracter, then change him to another. You can then get a normal player to play grims guitar! (he wont be pleased)

When your at the main menu push the colored frets ORANGE, BLUE, ORANGE, YELLOW, ORANGE, BLUE, ORANGE, YELLOW to turn this cheat off repeat the code.

Hyper mode makes the song go 1.5 times faster!!!

At the main menu press blue yellow orange red orange yellow red yellow red yellow red yellow red yellow red (you must enter this very fast or it wont work)and a confirmation will appear and says unlock everything and disables saving

Go to the main menu and press the following buttons

(only works if you press it really fast and you can't save it after you enter 1 cheat)

Air guitar mode:
Press Yellow, Yellow, Blue, Orange, Yellow, Blue

Performance mode:
Press Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow

Hyper speed mode:
Press Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow (Repeat the code to disble it)

Eyeball head crowd:
Press Blue, Orange, Yellow, Orange, Yellow, Orange, Blue

Monkey head crowd:
Press Orange, Blue, Yellow, Yellow, Orange, Blue, Yellow
Flaming head:
Press Orange, Yellow, Orange, Yellow, Orange, Yellow

Horse head:
Press Blue, Orange, Orange, Blue, Orange, Orange, Blue, Orange, Orange, Blue at

Unlockable gutairs:

"Snaketapus" Guitar Beat Hard Mode
"The Log" Guitar 5-Star every song on Expert
Battle Axe Guitar Beat Expert Mode
Casket Guitar Beat Medium Mode
Eyeball Guitar 5-Star every song on Hard
Fish Guitar Beat Easy Mode
USA Guitar 5-Star every song on Easy
Viking Guitar 5-Star every song on Medium

Unlockable bass gutairs:

Gibson SG Bass Beat 10 Songs in Co-Op mode
Gibson Grabber Beat 20 Songs in Co-Op Mode
Gibson Thunderbird Beat 30 Songs in Co-Op mode

Happy cheating!!!

Subbmitted by skyline_2fast_luffy

In middle of the song playing with the grim ripper pause it and leave for 10 to 15 mins and he will have a les paul

On the main menu push the frets orange, blue, orange, yellow, orange, blue, orange, yellow

On the main menu when it says press enter press Yellow, Yellow, Blue, Orange, Yellow, Blue frets.