Koro Koro Danjo-Kun

Koro Koro Danjo-Kun is Lala's invention that fires a laserbeam that switches anyone it comes into contact with between their opposite gender alter-egos.

Usage
Danjo-Kun has only been used to change Rito into Riko. Happening several times in front of friends and family, this has been quite embarassing for Rito.