The Shark Sub:

To beat the shark sub kill all the enemies that come out. Then hold L1 to aim

and shoot out the turrets on the sub to sink it.

GameShark Codes

Infinite Lives
800eddec0063 

Extra Lives
d005c098 ffff
8005c098 0001

Infinite Health
d005bf94 6fed
8005bf9a 2400
d005c604 718a
8005c60a 2400

Max Weapon
300ee110 0003

Max Granade
300ee111 0003

Max Head Looking Thing?
300ee114 0006   

Press R2 For Full Bio-Strike
d010b502fdff
800ee1140106 
  
Unlock All Levels
800edb4e0001  
  
High Score
800edde215e7
800edde605f5 

Thanks to Revolution readers Jonathan Sanchez and andre subrata!