To unlock cheat mode, complete Mission 3 and then select "Manage Figurines". Activate the following cheats by entering the corresponding sequences of buttons:
CHEAT FUNCTION - CHEAT CODE Assassin Rabbid - Hold C + Z and press 2 (2), 1 (2), A (2), 1 (2). Best Buy Geek Squad Rabbid - Hold C + Z and press A (2), 1 (4), 2 (2). Best Buy Store Employee Rabbid - Hold C + Z and press B, 1 (2), B, A, 2 (2), A. Kangaroo Rabbid - Hold C + Z and press 1 (5), 2, 1, 2. Prince Of Persia Rabbid - Hold C + Z and press 1, 2, 1, 2, 1, 2, A (2). Splinter Cell Rabbid - Hold C + Z and press B (4), A (4). TMNT Leonardo Rabbid - Hold C + Z and press 1 (2), 2 (2), A (2), 1 (2).
While playing the "High Stakes Steak" level, head down the stairs where the first blow Rabbid is located. Enter the room with a pipe and two orange Verminators guarding it to find a picture of Chuck Norris on the right wall.