Pause the game and press R, X, L, Y, Up, Right, Left, Down to unlock the Cow costume. If you entered the code correctly, you will hear a sound.

Pause the game and press L, R, Y, X, Left, Down, Left, Right to unlock the Cow headgear. If you entered the code correctly, you will hear a sound.

Pause the game and press Left, Right, Left, Right, Left, Right to unlock the Detective costume. If you entered the code correctly, you will hear a sound.

Pause the game and press Right, Down, Left, Up, L, R, L, R to unlock the Patchwork clothes. If you entered the code correctly, you will hear a sound.

Pause the game and press Down, L, Left, R, Up, Y, Right, X to unlock the Patchwork pants. If you entered the code correctly, you will hear a sound.

Pause the game and press Left, R, L, Right, Y(2), X(2) to unlock the Punk bottom. If you entered the code correctly, you will hear a sound.

Pause the game and press Up, X, Down, Y, Left, L, Right, R to unlock the Punk top. If you entered the code correctly, you will hear a sound.

Pause the game and press Y, X, Right, Left, L, R, Down, Up to unlock the Samurai armor. If you entered the code correctly, you will hear a sound.

Pause the game and press X, Y, R, L, X, Y, R, L to unlock the Samurai helmet. If you entered the code correctly, you will hear a sound.

Essences can be found at the following locations:

Brown Diamond: Flowers and Town Hall
Bubble: The Curio Shops and the snowman from the Synth-O-Matic
Diamond: Kayaking race course in the Mangrove Forest
Fire: Cool Trees and Roy's furniture store
Heart: Lovely Trees and phone booths
Leaf: Tree stumps, your houses, and Torajiro's house
Moon: Dr. F's Laboratory and the Heliport
Planet: The ski slope, stone pillar, and slide
Question Mark: Garbage cans and the Gondola Summit
Star: Lamp posts and Lovely House 2
Water: Fountains