Both mini-games grant additional Loco House parts and Pickories as prizes. Levels also contain ' Pickories' which can be collected by the LocoRoco and are used as a form of currency to play two mini-games outside of the main game. There are also hidden MuiMui throughout the levels to be found. Throughout the levels are areas that require a minimum number of LocoRoco in order to cause them to sing and wake up one of the planet's creatures, who will then reward the player with an item for their ' Loco House'. As the player collects more LocoRoco in a level, the music gains more voices, each LocoRoco singing a part in the overall song. The player can also cause the LocoRoco to jump by holding and releasing both buttons this not only allows the LocoRoco a way to cross gaps, but to burst through walls as well as harm the Moja without taking damage. This causes the LocoRoco to roll in the direction of tilt, as well as causing certain mechanical objects such as platforms to also tilt. With the exception of making them jump, the player does not otherwise directly control the LocoRoco, but instead controls the planet itself, tilting the planet using the L and R buttons. The player can lose LocoRoco if they are touched by harmful objects or they run into the Moja, and the game will be over if they lose all their LocoRoco. Manipulation of the LocoRoco in this manner may be necessary to guide them to the finish while the single large LocoRoco is easier to control, small passages can only be navigated by individual LocoRoco. The single large LocoRoco may be split into individual beings by pressing 'O' or through specific points on the level, while individual LocoRoco can merge back into a single being by holding down 'O'.

When a LocoRoco eats a berry, it grows by one, up to a maximum size of twenty. The player starts with a single LocoRoco.

Certain beings in the world can change the default shape of the LocoRoco into other forms, such as squares or triangles, which lasts until they wash off in water or they encounter another similar being. LocoRoco act as blobs of gelatin, deforming from their normally round shape when demanded by the environment. The player can then opt which LocoRoco they want to use for a level, however, this selection has no fundamental gameplay effects and only changes the songs used. There are six varieties of LocoRoco in the game, identified by their color, appearance, and musical voice, but outside of the first yellow one ( Kulche), the rest are unlocked as the player completes the levels. In each level, the goal is to reach the end point of the level, with the player scored on the number of LocoRoco found, the time to complete the level, and other factors. LocoRoco is divided into 5 worlds each consisting of 8 levels. members, but the army heads for him and jumps out. Kulche, a fun-loving yellow creature defeats one of the Moja corps. The Earth wakes up to investigate the disaster striking the universe. Suddenly, a group of Mojas invade the planet, attempting to attack the LocoRocos. But then, a meteorite crashes into the universe. A group of joyful blob-like creatures called the LocoRocos lived on a planet.

Psp game locoroco