I Spy Challenger Codes -

Level select:
Press during game play, then select the "Code" option. Enter one of the following codes to advance to the corresponding level.

 Level 2 (easy difficulty): Press (x2), .
Level 2 (expert difficulty): Press (x3).
Level 2 (hard difficulty): Press (x2), .
Level 2 (medium difficulty): Press (x2), .
Level 5 (easy difficulty): Press (x2), .
Level 5 (expert difficulty): Press (x2), .
Level 5 (hard difficulty): Press (x3).
Level 5 (medium difficulty): Press (x2), .
Level 10 (easy difficulty): Press (x3).
Level 10 (expert difficulty): Press (x2), .
Level 10 (hard difficulty): Press (x2), .
Level 10 (medium difficulty): Press (x2), .
Level 15 (easy difficulty): Press (x2), .
Level 15 (expert difficulty): Press (x2), .
Level 15 (hard difficulty): Press (x2), .
Level 15 (medium difficulty): Press (x3).
Level 20 (easy difficulty): Press , , .
Level 20 (expert difficulty): Press , , .
Level 20 (hard difficulty): Press , , .
Level 20 (medium difficulty): Press , , .