Chibi-Robo: Park Patrol

This game is titled Chibi-Robo: Park Patrol in North America and Sakasete! Chibi-Robo! in Japan.

Unlockables

Successfully complete the game to unlock the following bonuses.
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The Kuros will turn pink and sometimes turn a flower into a rainbow flower for unlimited energy.
You can now use Park Editors to to change the design of your park to those of pre-made maps.

Strategy guides from GameFAQs