Toothbrush
The Toothbrush is a tool in the series.
Chibi-Robo! Plug Into Adventure!
At night, the toothbrush appears on the floor. Telly suggests that it could be used to clean stains. You can earn Happy Points for doing so. There are stains like mud from footprints, paws, or puddles, tears, and oil.
Chibi-Robo! Photo Finder
The toothbrush returns in this game. It can be used in Joshy Bear's request to clean the garage. It can clean the multicolored stains.
Found on the episode "Chibi's First Story / In the Street"