Kiro Kiro no Mi

The Kilo Kilo no Mi retains its Japanese name. It allows the user to change their weight from 1 to 10,000 kilograms without in anyway affecting the overall size of their bodies. In the 4Kids dub, kilograms are replaced by pounds. "Kilo" is the short version of Kilogram that multiplies a unit by a thousand. It was eaten by Miss Valentine.

Strengths and Weaknesses
This fruit's main strength is that it allows the user to change their weight at will. They can go from being 1 kilogram, light enough to float on the wind with an umbrella (despite the rather obvious fact that 1 kilogram is nowhere near light enough to float), to 10,000 kilograms, dropping with intense force to crush the opponents.

However, in the case where the user is dropping with extreme weight, a swift enough opponent can simply dodge the attack while the user crashes into the ground, causing potentially lethal injuries to themselves due to the force of the crash. Aside from this, the user also suffers the standard Devil Fruit weaknesses.

Usage
Miss Valentine usually uses her ability to change her weight to either become extremely light to make high jumps, assisted with her umbrella, and then increase her weight dramatically to crash down and crush her opponents.

Below is a list of her named techniques:
 * 10,000 Kilo Press (一万キロプレス): First Miss Valentine makes herself weigh one kilogram so she can use her umbrella to float above her opponent to aim her attack. Then, when she's directly over her target she rapidly increases her weight to 10,000 kilograms and crushes her opponent flat. This is called 10,000 Kill-o-Press (a pun off of "kill") in the Viz Manga, 10,000 Pound Press in the 4Kids dub, and 10,000 Kilogram Press in the FUNimation dub.


 * Hissatsu: 10,000 Kilo Guillotine (必殺:一万キロギロチン): Similar to the 10,000 Kilo Press only this time aims for the opponents head or neck and she drops down with one of her legs extended straight out towards to either smash or cut off the opponent's head. This is called 10,000 Kill-o-Guillotine in the Viz Manga and 10,000 Kilogram Guillotine in the FUNimation dub. This technique was removed in the 4Kids dub.


 * 5,000 Kilo Press (五千キロプレス): Similar to the 10,000 Kilo Press only with 5,000 kilograms used. This is called 5,000 Kill-o-Press in the Viz Manga and 5,000 Kilogram Press in the FUNimation dub. This technique was removed in the 4Kids dub.


 * Crescendo Stone (強くなる石（クレッシエンド ストーン）): A torturing technique. Miss Valentine sits on her opponent and slowly increases her weight, usually in intervals of 100 kilograms, until she crushes them like a bug. "Crescendo" is an Italian word which means "growing", in musical notation "crescendo" means that the notes are gradually getting louder. This technique was removed in the 4Kids dub.

Links

 * Weight - Wikipedia entry on ability controlled by Miss Valentine's Devil Fruit