Cheats

LocoRoco (1)
From the World Map (unless noted otherwise), select a level so you are on the "Start? Yes / No" message. Hold L & R and input the following codes:
 * A = Triangle
 * T = Triangle
 * O = Circle
 * C = Circle
 * S = Square
 * X = X
 * L = Left on d-pad
 * R = Right on d-pad
 * U = Up on d-pad
 * D = Down on d-pad
 * SLACRLOCOROCO Open all stages
 * STARSLOCOROCO Gives you 10,000 coins
 * ALLCOLORSLOCOROCO Gives you all the Muimui
 * On Loco Editor Menu: SCALUDLOCOROCO Turns on scaling.
 * On Loco Editor Menu: ALLLOCOROCOS Gives you all the parts
 * On Loco Editor Menu: ATTACLOCOROCOS Lets you use the 12 Special Loco Editor parts in Loco House (like the "toge")
 * On Loco Editor Menu: LOTSOLOCOROCOS Adds 5 locorocos of each color to your Loco House.
 * On Loco Editor Menu: RADCATLOCOROCO Adds special part editing

LocoRoco 2
Alternate Menu Pathway
 * At the Main Menu, if you don't press anything for awhile, you will notice the LocoRocos will play around and proceed to a playground designed. However, there is an alternate path in which they will go. Let them proceed through the following: Cannon, Wheels, Chuppa, Nyokki, Gamumuht, air current, and Mui Mui crevice. When they reach the rotating bowl, start tapping the right shoulder button (you will hear a sound). Then the Mui Mui will pull a right lever, causing the bowl to tip right. The LocoRoco will now go through an alternate playground.

Collecting maps unlocks secret levels. These are the 4 levels you can unlock:
 * BuiBui Fort 3 - Collect all 3 Smudged Maps
 * JaoJab 3 - Collect all 3 Coarse Maps
 * Kelpaton 2 - Collect all 3 Soggy Maps
 * Perculoka 2 - Collect all 3 Bumpy Maps