Cheater's Menu:
Pause the game and press Up, Up, Down, Down, Left, Right, Left, Right, White, Black, X. Enter it twice to enable simultaneous cheats.

Every Level and Cinema:
Once the game loads, select Play Game. Choose a slot you want to play in. On the next screen press Black, White, Black, White, X.

Hints

Warp Pipe Locations:
In Chapter 1, section B go through the level until you come to a balcony over a courtyard. Do the Cheater's Menu code above and enable Blizzow to get every power in the game. Get on top of the edge of the balcony and pick the Timeshift from the D-Pad quick menu. Look towards the ramp on the upper platform and walk forward and use Timeshift. Twice should be enough to get onto the platform. Once there go to the back of the platform and you will see a ramp leading down to 3 warp pipes. The left pipe will bring you to Agenda: chapter 3 part F, The middle one goes to Extinction Agenda chapter 3 part A; finally, the one all the way on the right will bring you to Surface Tension chapter 2 part A.