Devil fruits are extraordinary objects that are born out of people's desire to evolve. Every devil fruit is unique and grants a different power. There are three different types of devil fruits: paramecia, zoan, and logia. Each class contains devil fruits that provide their users with an unimaginable amount of power.
Due to the lack of information about these mysterious objects, most of the time people are unaware of what kind of devil fruit they are consuming. They occasionally strike gold and end up with a powerful devil fruit. Despite the power that they have at their disposal, certain One Piece characters still tend to ride their luck. These One Piece characters nullify the efficacy of their devil fruits due to their incompetence.
7 Bara Bara no Mi
Buggy is one of the Yonko and the leader of the Cross Guild. He was introduced in the Orange Town arc, and he served as its main antagonist. Buggy is not a strong character by any means, but due to several misunderstandings, he has garnered the reputation of being a fearsome pirate.
Buggy accidentally ate the Bara Bara no Mi, which allows its user to split their body into different pieces. While the paramecia-type fruit does not provide Buggy with any physical attacks, it makes him immune to slashing attacks. This is an incredible ability to have, as most of the strong characters in One Piece use swords as their main weapon. Under a better technician, the Bara Bara no Mi could do wonders.
6 Gasu Gasu no Mi
Caesar is among the most intelligent characters in the series. He used to be a member of MADS, where he worked alongside Dr. Vegapunk. After being kicked out, Caesar began collaborating with pirates and started making weapons for them.
Caesar possesses the Gasu Gasu no Mi, which is a Logia-type devil fruit. It allows Caesar to control and create gas at will. In his gaseous state, Caesar can reach places that would normally be impossible. The devil fruit's biggest power is that it can affect gases that are already present in a certain location. Caesar was able to remove oxygen from the air, which could potentially kill a person. Sadly, the scientist never explored the other abilities of the devil fruit, thus wasting its power.
5 Noro Noro no Mi
Foxy is the captain of the Foxy Pirates and the main antagonist of the Long Ring Long Island arc. He challenged Luffy to a Davy Black Fight, which he eventually lost.
Foxy possesses the Noro Noro no Mi devil fruit. With the help of his paramecia-type devil fruit, Foxy can shoot Noroma Photons, which can slow down an object for 30 seconds. Under a stronger character, this ability could do wonders. As the target would be slowed down, the user could potentially land several critical hits. Unfortunately, the devil fruit won't be changing hands anytime soon. As a result, it will inevitably go to waste.
4 Horo Horo no Mi
Perona used to be a member of the Mysterious Four of the Thriller Bark. She played a crucial role in the Thriller Bark arc, where she tried to help Gecko Moria to deal with the Straw Hat Pirates. However, she was stopped in her tracks by Bartholomew Kuma, who sent her to Kuraigana Island.
Perona ate the Horo Horo no Mi, which belongs to the paramecia class of devil fruits. With the help of this devil fruit, Perona can produce ghosts that can be used in various ways. Anyone who comes in contact with the ghosts instantly loses their will to live. She can also create ghosts that explode on command. Considering the devil fruit robs a person of their fighting spirit, Perona should have trained her powers and become a lot stronger.
3 Hebi Hebi no Mi, Model: Yamata no Orochi
Orochi was the Shogun of Wano, and he also served as one of the major antagonists of the Wano Country arc. He came into power after betraying Oden and the rest of the country. Orochi used Kaido's help to stay in power, but eventually, both of them were taken down.
Orochi possessed the Hebi Hebi no Mi devil fruit, Model: Yamata no Orochi. This devil fruit is a mythical zoan-type that allows its user to transform into a mythical creature with eight heads. The wielder of this devil fruit can only be killed after they have been decapitated eight times. The power to survive multiple critical wounds is very underrated. Sadly, a weakling like Orochi could never use this power to his advantage.
2 Ton Ton no Mi
The Ton Ton no Mi is a paramecia-type devil fruit, and it was eaten by Machvise of the Donquixote Pirates. The devil fruit allows the user to increase their weight at will, which is a rather dangerous ability. Machvise's method of using the devil fruit was very limited. He mainly increased his body weight and tried to crush his opponents with it.
There are numerous other applications for this devil fruit A better fight could use the power to alter the weight of their arms or legs, which would increase the power of their attacks without exposing their weak spots.
1 Numa Numa no Mi
The Numa Numa no Mi is a Logia-type devil fruit, and it was eaten by Caribou. He belongs to the new generation of Super Rookies, and he has a bounty of 200 million berries. Suffice it to say, Caribou's devil fruit has played a major role in his rise to infamy.
The devil fruit can create swamps that are bottomless, making it impossible for a person to escape. With such a powerful devil fruit at his disposal, Caribou should be handling it much better.