At the main menu or character selection screen, press Select, Up, L2, R1, L1, R2. If you entered the code correctly, you will hear a sound. Everything will now be unlocked in cerebo mode and Boss characters will be playable.
Lock Movies, Bosses, And Survival Pictures 1 And 2
At the main menu or character selection screen, hold Select + Start. The game will return to the main menu. Everything except academy mode rewards will be locked again in cerebo mode.