Spider-Man and Venom - Maximum Carnage Cheats
Go to the ATM in the first level where you can play as Venom. Press B + Y to jump to a secret level.
Fighting more than one Boss
When fighting more than one boss, do not hit them. Instead, wait until you are in between them (or you can climb a wall before they appear). When you are between them, use your web and if they both are caught, they will both die.