At the player select screen, enter the following:

Up, Up, Down, Down, Right, Left, Right, Left, B, A  

 

Enter the following password:

01804306
0180488D  

 

Enter the following password:

01804301
0180488D  

 

Enter the following password:

01804302
0180488D  

 

Enter the following password:

01804303
0180488D 

 

Enter the following password:

01804304
0180488D  

 

Enter the following password:

01804305
0180488D 

 

Enter the following code: 01803100  

 

Enter the following code: 01803104  

 

Enter the following code: 01803709  

 

Enter the following code: 01803108 

 

Player 1 has more lives 0184578C
Player 2 has more lives 0184579C
Player 1 has unlimited lives 01A4902C
Player 2 has unlimited lives 01A4AD2C