Katakuri ate the Mochi Mochi no Mi, a Paramecia-type Devil Fruit that lets him create, control, and transform into mochi at will.
His mochi is extremely thick and adhesive, allowing him to trap even extremely strong enemies with it.
The fruit allows Katakuri to avoid physical attacks seemingly like a Logia user, although instead of the attacks simply going through his body, he uses his superior Kenbunshoku Haki to predict where he’ll be hit and change the shape of his malleable mochi body accordingly to dodge with minimal movement.
He is very creative when using his fruit, as he used mochi to create earplugs to protect himself and his siblings from the sound of Big Mom’s scream, and also used it to plug up and disable the cannons of Bege’s Big Father fortress.
He frequently uses these abilities in hand-to-hand combat, sprouting several tendrils of mochi on his body to act as extra fists or legs; he can imbue these tendrils with Haki to deliver hard punches and kicks. By concentrating mochi into a single fist, Katakuri is capable of delivering punches of devastating power.
Katakuri has awakened his Devil Fruit powers, enabling him to transform inorganic material into mochi, enhancing the range of his attacks and capture field.
The Mochi Mochi no Mi is considered to be a “Special Paramecia”: although the details have not been explored, its current user has shown abilities similar to those of a Logia, such as transforming into mochi to block bullets, being blown apart by attacks only to reform, or keeping weapons hidden within the substance of his body.