Instructions
Battle Method
Swing towards the New Goblin, and press the X button when he is directly underneath you. This will cause Spider-Man to drop down quickly and he should land on the glider. If you miss the glider, press the R1 button quickly to continue web-slinging and prevent Spider-Man from falling all the way to the ground. Swing back toward the New Goblin and try again.
Press L2 to enable your "spider sense." Use the left analog stick to dodge the New Goblin&'s attacks.
Press X, O, and triangle to punch and kick the Goblin once you have avoided his attacks. You will eventually be thrown off his glider.
Jump to avoid the Goblin as he swoops in. Swing up in the air and land on his glider again to continue damaging him.
Repeat this process several times and keep inflicting damage on the Goblin. When he is defeated, the game will automatically go to a cut scene showing Spider-Man victorious. You will then find the New Goblin is available in the main menu as a playable character.
By Cheat Code
Stand on the Helicarrier with your Spider-Man character. You will encounter this vehicle throughout various levels in the game.
Press "left" arrow, "down" arrow, "right" arrow, "right" arrow, "down" arrow, and "left" arrow on your directional control pad. You will hear a chiming noise which means the code you entered is accepted.
Exit the current game and go to the Main Menu. The New Goblin will now be available as a playable character.