The following cheat codes are for Nickelodeon Barnyard on PlayStation 2.
| CHEAT CODES |
|---|
| Hold bttnR1 + bttnR2 while entering the codes during normal gameplay. |
| 9,999 Gopher Bucks | bttnX (x2), bttnSquare (x4), bttnTriangle, bttnSquare |
| All Antics | bttnTriangle, bttnSquare, bttnX, bttnCircle (x2), bttnX, bttnSquare, bttnTriangle |
| All Bonus Items | bttnTriangle, bttnCircle, bttnX, bttnSquare (x2), bttnX, bttnCircle, bttnTriangle |
| All Knapsack And Flower Pack Items | bttnX (x2), bttnTriangle, bttnCircle, bttnSquare (x2), bttnCircle, bttnTriangle |
The following cheat codes are for Nickelodeon Barnyard on Nintendo Wii.
| CHEAT CODES |
|---|
| Hold bttnC + bttnZ on the Nunchuk while entering the codes during normal gameplay. |
| 9999 Gopher Bucks | dpadDown (x2), dpadLeft (x4), dpadUp, dpadLeft |
| All Flower Pack And Knapsack Items | dpadDown (x2), dpadUp, dpadRight, dpadLeft (x2), dpadRight, dpadUp |
| Unlock All Antics | dpadUp, dpadLeft, dpadDown, dpadRight (x2), dpadDown, dpadLeft, dpadUp |
| Unlock All Bonus Items | dpadUp, dpadRight, dpadDown, dpadLeft (x2), dpadDown, dpadRight, dpadUp |