Barnyard (Cube)

Unlock all Bonus Items:
At the title screen, hold L + Z and press Y, B, A, X, X, A, B, Y.

Unlock all Knapsack and Flower pack items:
At the title screen, hold L + Z and press A, A, Y, B, X, X, B, Y.

Get9,999 Gopher Bucks:
At the title screen, hold L + Z and press A, A, X, X, X, X, Y, X.

Unlock all Antics:
At the title screen, hold L + Z and press Y, X, A, B, B, A, X, Y.