At player select hold "L"and"R" while choosing anyone to start game(works on 1 and 2 player).See what happens?
Submitted by steven stinson
At the character screen, press C-Down, C-Up, L, C-Right, C-Down, and then press R.
Submitted by GRAND MASTER GAMER X
After you destroy most cars the hood opens, if you are Smasher, you can pick up the engine and use it for a weapon.
Submitted by Josh (firstname.lastname@example.org)
To get a weapon in car park (1.1) there should be 3 bars on each side of the level when you get into the part where the van comes in go over to the bars and press A and they will grab the bar and now you have a weapon!!!
Submitted by kyle (email@example.com)