Spider-Man: Friend or Foe Cheats - PlayStation 2

Unlock Venom and new Green Goblin
Venom and new Green Goblin (from the movie) can be unlocked by entering the following codes using the D-Pad when standing in the Helicarrier in between levels. You should hear a tone indicating you entered the code correctly and they will then be selectable from the sidekick select console:

[Left], [Down], [Right], [Right], [Down], [Left] - New Green Goblin
[Left], [Left], [Right], [Up], [Down], [Down] - Venom
[Up], [Up], [Down], [Down], [Left], [Right] - 5000 upgrade tokens
[Right], [Right], [Right], [Up], [Down], [Left] - Sandman

Unlock Sidekicks
To unlock sidekicks, you have to either get to a certain point in the game or buy them from the shop:

Black Cat - Beat the tutorial level.
Blade - Buy for 1000 tokens in the shop.
Doctor Octopus - Buy for 500 tokens in the shop.
Green Goblin - Buy for 750 tokens in the shop.
Sandman - Buy for 1250 tokens in the shop.
Venom - Buy for 1500 tokens in the shop.

Unlock characters
As you play through the game, you'll unlock these characters:

Black cat - Complete level 1 of Toyko.
Blade - Complete level 2 of Transylvania.
Doc ock - Defeat him in level 2 of Tokyo.
Green goblin - Defeat him in level 4 of Tokyo.
Iron fist - Complete level 3 of Tangaroa island.
Lizard - Complete level 2 of Cairo.
New goblin - Beat the game.
Rhino - Defeat him in level 4 of Tangaroa island.
Sandman - Defeat him in level 4 of Cairo.
Scorpion - Defeat him in level 2 of Tangaroa island.
Venom - Defeat him in level 4 of Transylvania.

Unlock Black Suit Costume
Complete the second Nepal level and you will be able to use it after completing the game. This suit has increased strength and speed.