Masu Masu no Mi
Japanese Name: マスマスの実
English Name: Mass-Mass Fruit;

Grow-Grow Fruit (FUNimation)

Meaning: Mass
First Appearance: Fanon
Type: Paramecia
Eaten by: Underdue

The Masu Masu no Mi is a Paramecia-type Devil Fruit that allows the user of it to expand any part of their body into giant proportions, by breathing in big amounts of air. It was eaten by Underdue, the first mate of the Shooting Star Pirates. "Masu" is the Japanese word for "mass", but "masu masu" means "more and more", "increasingly" or even "growing".



The Masu Masu no Mi.

Before Underdue ate it, the fruit was briefly revealed. The Masu Masu no Mi is similar to a pumpkin or even a watermelon, due to its size and its segmented body. It is green in color and has a big, thick stem. Like every other Devil Fruit, the Masu Masu no Mi as a pattern of swirls all throughout its shell.

Strengths and WeaknessesEdit


The Masu Masu no Mi gives the user the ability to expand all of their body parts by breathing in air as if a balloon. This new power gives the person increased strength and endurance. Similarly to Monkey D. Luffy's Gear Third, this power gives Underdue's body more mass and a larger area to attack with far greater strength.

A unique usage of this fruit's powers is enlarging internal organs. Unlike Gear Third, with this particular ability, Underdue can actually expand his organs' size. He used it to enlarge his lungs so he wouldn't breathe toxic gas.


The user suffers from standard Devil Fruit weaknesses. During its usage, the user boosts all those powers, but he loses most of his mobility for this gained power. The user also becomes abnormally short after using the fruit's ability for too long.




Underdue in his giant mode.

  • ' (? literally meaning ""):


  • The Devil Fruit was originally User:UndeadHero's. Thanks for letting me use it Onion-head-smiley-00087. According to him, "a balloon inspired this fruit".


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.