Parks worldwide are being polluted and destroyed! In an act of community service, Citrusoft Robotics manufactures a new model of Chibi-Robo, called Blooming Chibi-Robo. These new models are specifically designed to clean up and beautify parks, rebuild park equipment, and deal with any pollution sources.

Chibi-Robo!: Park Patrol is a game where you take control of a tiny robot called Chibi-Robo, and cause flowers to bloom in your assigned park. You can increase the amount of flowers in your park by pulling out a boom box, and spinning the tape spool. This will cause both Chibi-Robo and the nearby flowers to dance. White flowers will spit out more seeds, which can then be watered with the squirter to cause new flowers to grow. The squirter can also be used to combat Smoglings - nasty creatures that can hurt Chibi-Robo and kill the flowers in his park.

The more flowers in the park, the more visitors it attracts. More flowers also means that Chibi-Robo will earn new upgrades, such as longer lasting batteries (which let him explore more of the park without needing to recharge), vehicles such as a bike, which lets him travel faster, and cartridges that let him repair the park.