Koro Koro Danjo-Kun

Koro Koro Danjo-Kun, also known as Mr. Gender Bender in the English Sentai dub, is one of Lala's inventions. This invention is only used for the appearances of Yūsaki Riko in the series.

Feautures
The Koro Koro Danjo-Kun is a laser gun which beam can temporally changes sex of the an human target for an indefinite but, generally, short time. In Darkness, Lala says the effect can be reverted even with another beam.

It looks a laser gun with Deviluke's symbol at the side of this invention, black trigger and white, blue and magenta portions. But in Darkness, these portions are white, blue, red and yellow. A magenta portion is changed to yellow.

Appearance
In To LOVE-Ru its used three times:


 * Chapter 106 (adapted in episode 3 of Motto To LOVE-Ru): When Saruyama fall in love with Rito' female form, Lala use this invention for turning Rito into Riko and set a date with Saruyama (unaware of Riko' real identity). Reluctantly, Rito agrees only because he is his childhood friend. At the end, Rito run away when the effect end and return a boy whitout be discovered from Saruyama.


 * Chapter 131: It is used for pleasing Celine's desire when she ask some breast milk and Lala turn Rito in Riko who naturally get angry.


 * Chapter 138: Its activated accidentally when Rito goes down the staircase rapidly (escaping from Yami after see her half-naked in Mikan'room) and runs into with Lala who is holding the gun and talking of another date with Saruyama. Rito is turned and Riko and escape outside. Later he is attacked from the Principal, but is saved from Yui' brother and return a boy.

In the sequel To-Love Ru Darkness its used three times:


 * Chapter 8 (adapted in episode 5 and 6 of To Love-Ru Darkness anime): It is used by Lala intentionally to show Mea the ability of changing sex of the Memorzeans and use Rtio as example. So, she shows Mea a similar transformation between Rito and Riko as between Ren and Run. Rito spend the entire chapter turned in Riko ending groped and licked, half naked, from Mea and Momo in his room until he return a boy and Mikan caught the trio in an embrassing moment.


 * Chapter 38 (adapted in OVA 7 of Darkness): When Oshizu ask help because there too many patients in Mikado's Clinic, Momo take the chance to transforms Rito in Riko just to dress her as a nurse. The Koro Koro Danjo-Kun doesn't appear, but its implied Momo used it off-screen.


 * Chapter 74: Its used the last time from Nemesis who turn Rito into Riko (changing even he dress) on the roof of the school while she herself transform into the male version of Rito. Nemesis then subject Riko to the same shameless acts he usually does to girls saying Rito should accept the Harem Plan and takes responsibility for all the girls he's done indecent things to.

Trivia

 * Koro Koro means "easily changeable" and Danjo means "male and female" in Japanese.
 * It has a similar effect to Pai-Pai Rocket-Kun and the unique difference is that this experiment is more portable and has a temporal and short effect.
 * Besides Rito, no one has been affected by this invention.
 * It belongs to the inventions that change appearance at least once in the anime.