Barnyard
While playing the game, hold C + Z on the Nunchuck and press Down two times, Left four times, Up, Left on the Wii-mote.
At the main menu, hold C + Z on the Nunchuck and press Up, Left, Down, Right two times, Down, Left, Up on the Wii-mote to unlock all Antics.
While playing the game, hold C + Z on the Nunchuck and press Down two times, Up, Right, Left two times, Right, Up on the Wii-mote to unlock all Knapsack and Flower Pack items.
At the main menu, hold C + Z on the Nunchuck and press Up, Right, Down, Left two times, Down, Right, Up on the Wii-mote to unlock all bonus items.
When Ben tells you to use the metal detector to locate the Gopher's coins, go to the barnyard. On the right side of the farmer's house you will see yellow flowers. Use the metal detector to find a group of coins. At night, go in and out of the party. Each time you use the metal detector on the side of the farmer's house you will get more coins.