Chibi-Robo! Park Patrol

It is the sequel of the original Chibi-Robo! for the Nintendo GameCube. Unlike the previous game, Chibi-Robo! Park Patrol takes place almost entirely outdoors, and puts the player in the role of the titular character Chibi-Robo, a 4-inch tall robot tasked with revitalizing a park. The player does so by growing seeds into flowers by watering them with a squirter, and then spreading more seeds by causing the flowers to dance using a tiny boombox. The player can also alter the terrain, build and repair various structures, visit the accompanying town, and defend the park from noxious Smoglings, bits of pollution which can kill flowers.

Source: Wikipedia, "Chibi-Robo!: Park Patrol," available under the CC-BY-SA License.