Track name... At the main menu enter the following... 
ACME Factory L2, R1, R2, Triangle, Circle, Select 
Duck Dodgers Speedway Circle, Left, Square(2), R2, Select.  
Forest Speedway  Triangle, R2, Left, Triangle, L1, Select.  
Garden Speedway R1, Right, Left, L1, Square, Select.  
Planet X Speedway R1, Square, Circle, L2, Triangle, Select.  
Planet Y Right, Left, Triangle, L2, L1, Select.  
Wackyland L1, Circle, Square, R2, Triangle, Select.  

 

Character Enter the following at the main menu to unlock the character 
Duck Dodgers  L2, Square(2), Triangle, Circle, Select.  
Evil Scientist  Square, Circle, L2, R2, Triangle, Select.  
Foghorn Leghorn Right(2), L2, Square(2), Select. *  
Genie Square, L1, R1, Triangle, Circle, Select.  
Gossamer Triangle, Circle, R2, R1, Square, Select.  
Granny Circle, Triangle(2), L1, R1, Select.  
Hector Triangle, L2, L1, Triangle, Square, Select.  
Pepe Le Pew  Left, Right, R1, Circle, Square, Select.  
Rocky Triangle, Left, R2, Circle(2), Select.  
Sylvester Left(2), L1, Triangle, Circle, Select.  
Yosemite Sam  Left, Right, R2, Square, Circle, Select.