#6-Ryu Ryu no Mi, Model: Pachycephalosaurus
The Ryu Ryu no Mi, Model: Pachycephalosaurus is an Ancient Zoan-type Devil Fruit that allows the user to transform into a hybrid and full version of a pachycephalosaurus at will.
It was eaten by Ulti, one of the Beasts Pirates Headliners and one of the Six Flying Fighters, six of the strongest Headliners.
Much like other fruits in the Ryu Ryu no Mi series, this fruit grants a tremendous increase in the user’s physical strength. Ulti was able to grab Monkey D. Luffy and quickly immobilize him, with Luffy being unable to quickly escape despite being tremendously strong himself. The user’s skull also greatly increases in size and thickness, which suits Ulti due to her fighting style revolving mainly around headbutting opponents.
#5-Hebi Hebi no Mi, Model: Yamata no Orochi
The Hebi Hebi no Mi, Model: Yamata no Orochi is a Mythical Zoan-type Devil Fruit that allows the user to transform into a hybrid and full version of the Yamata no Orochi, an eight-headed serpent.
It was eaten by Kurozumi Orochi, who’s the current shogun of the Wano Country and an ally of Kaido, one of the Yonko.
This fruit grants the user eight separate, extremely long-necked heads, each one capable of speech on their own. It appears that the user has some degree of control about the number of heads that can sprout at once, with eight being the maximum limit. Curiously, some of Orochi’s human form features, such as his crown and mustache, are present only in one of the heads.
In this form, the user is able to bite opponents with a considerable amount of strength and range, the latter due to the elongated necks.
The user also has a fair amount of durability in their transformed state, with Orochi being capable of sustaining damage from a ceiling collapsing on his head with few repercussions.
#4-Zou Zou no Mi, Model: Mammoth
The Zou Zou no Mi, Model: Mammoth is an Ancient Zoan-type Devil Fruit, which allows the user to transform into a mammoth hybrid and full mammoth at will.
It was eaten by Jack, who’s an All-Star of the Beasts Pirates, one of Kaido’s three right-hand men, known as the Disasters, and the captain of the Mammoth.
The full mammoth form granted by this fruit gives the user a massive frame, significantly increasing Jack’s already abnormal size. Jack can level buildings with a single swing of his trunk and leave imprints of his feet on the ground just by stepping on it.
#3-Ryu Ryu no Mi, Model: Brachiosaurus
The Ryu Ryu no Mi, Model: Brachiosaurus is an Ancient Zoan-type Devil Fruit that allows the user to transform into a brachiosaurus hybrid and a full brachiosaurus at will, granting him an immense boost to size and bulk. The user’s immense weight can be used as a weapon, as very little will be able to withstand the crushing pressure of their massive transformed body.
It was eaten by Queen who’s one of Kaido’s 3 Disasters. It has been implied that Queen is even stronger than the extremely powerful Jack.
#2-Ryu Ryu no Mi, Model: Pteranodon
The Ryu Ryu no Mi, Model: Pteranodon is an Ancient Zoan-type Devil Fruit that allows the user to transform into a pteranodon hybrid and a full pteranodon at will.
It was eaten by King, who’s supposedly the strongest Disaster of the Beasts Pirates.
This devil fruit gives him the ability of flight, so that he can perform extremely powerful aerial attacks from mid air as shown when King toppled the Queen Mama Chanter, a gigantic ship, with enough force to throw Big Mom off.
#1-Kaido’s Unnamed Devil Fruit
Kaido has eaten a Mythical Zoan-type Devil Fruit that allows him to turn into an eastern dragon. In this form, he is capable of moving through the air by creating clouds and using them as footholds.
He can also release devastating blasts of hot air from his mouth, which can easily blow apart a large area.