Sonic Rush cheats and cheat codes for Nintendo DS

Unlock Blaze: Beat the first boss
Unlock sound sets: Complete the Extra zone
Unlock Sound Mode and Time Attack: Finish the game 

Unlock extra zone: 
Play with Super Sonic and Super Blaze:
Finish Sonic's and Blaze's story line and collect all 7 chaos emeralds.
The Extra Zone will be unlocked on the character selection screen.

Unlock classic zones in time attack:
Complete extra story to unlock  Zone X Act 1, Act 2,  Act 3 and Act 4

Longer flying:
While playing Blaze, rapidly tap R to stay in flight longer.
This will increase your time of flight in the air.

Chaos Emerald colors in each zone: 
Zone 1: Red
Zone 2: Blue
Zone 3: Yellow
Zone 4: Green
Zone 5: Silver
Zone 6: Light blue
Zone 7: Purple 
Subbmited by: Joshua

How to defeat waves of enemys without losing rings and other power-ups 
such as:barriers,magnetic barriers and 1-ups- (which makes you gain 
lives).  This cheat doesn\'t need to be used when you are invincible. 
 This cheat also makes use up tension.

Firstly gain tension by getting power-ups and doing tricks (before you
 fight enemys).  So if you are in a closed room-(with a flat floor)
press the Y button repeatedly (in which direction you are going using the 
control pad) until you have defeated all of the enemys in the room.