Anime fans have seen many series come and go, but One Piece has managed to stay around for more than two decades, and its popularity has continued to increase. The series has introduced hundreds of characters, but its focus has always been on Monkey D. Luffy and the Straw Hat Pirates. Luffy ate the Gum-Gum Fruit when he was a child, and it gave his body the properties of rubber.

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This might not sound like an impressive power, but Luffy has managed to do a lot of things with it, and he has used it to beat some very powerful enemies. For the most part, Luffy has managed to defeat these characters without any help, and there are plenty of other strong characters in the series who he can beat all on his own.

10 Luffy's Haki Can Break Through Daz Bonez's Devil Fruit

Daz Bonez Using The Dice-Dice Fruit One Piece

The Dice-Dice Fruit is a Paramecia Devil Fruit that currently belongs to Daz Bonez, and it allows him to turn any part of his body into a strong steel blade.

Pre-timeskip Luffy might have had a hard time fighting Daz, but post-timeskip Luffy has powerful Armament Haki. When fans last saw Daz, he did not possess any Armament Haki of his own. That means he shouldn't be able to cut through Luffy's Haki-infused skin, and Luffy should also be able to break all of Daz's blades.

9 Machvise's Devil Fruit Is Countered By Luffy's Speed

Machvise About To Fight Franky One Piece

There are quite a few pirates who need to train harder, and the argument can be made that Machvise is one of those pirates since he solely relies on his Devil Fruit. The Ton-Ton Fruit allows Machvise to increase his body weight by several metric tons, and he fights by falling down onto his opponents.

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Machvise is capable of injuring giants with this ability, but it won't do much good against someone like Luffy. The best way to counter Machvise is to get out of the way of his attack, and Luffy can do that with ease by using Gear Second or Fourth. Once he evades Machvise, Luffy can them hit him with a Haki-infused Elephant Gun attack.

8 Monet's Logia Powers Are Countered By Luffy's Haki

Monet Attacking Monkey D. Luffy in One Piece

Luffy managed to earn the respect of the Marines at Punk Hazard because of his actions, and he might have received even more praise if he defeated Monet too. She looks like a harpy because her arms and legs were replaced with wings and talons, but what really makes her troublesome is the Snow-Snow Fruit.

This Logia Fruit allows Monet to create, control, and transform into snow. Like other Logia users, normal physical attacks can simply pass through her body. Armament Haki counters a Logia users' intangibility, so all Luffy has to do is hit her with a barrage of Haki-infused punches.

7 Diamante's Devil Fruit Wouldn't Pose Much Of An Issue

Diamante Using His Devil Fruit On His Sword One Piece

Rebecca, one of the series' most likable post-timeskip characters, was forced to endure a lot of pain at the hands of Diamante and the Donquixote Pirates. Diamante is a high-ranking member of the crew, and he possesses a Devil Fruit which allows him to make his body and non-living material flat and flexible like fabric.

This power wouldn't do much against Luffy because Diamante cannot lessen the blows of Luffy's attacks. Diamante can use both Observation and Armament Haki, but Luffy's Haki is much stronger, and he can move faster than Diamante.

6 Luffy's Armament Haki Is Likely Stronger Than Pica's

Pica's Full Body Armament Haki One Piece

Pica is one of the Donquixote Pirates' top three officers, and he possesses the power of the Stone-Stone Fruit, which gives him the ability to manipulate stone. This power also allows Pica to merge with any type of stone, which is why he can transform into a colossal stone golem.

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Pica's Armament Haki is very strong, and he can coat his entire body in it, but Zoro was able to injure him with his own Haki. Luffy's Haki is stronger than Zoro's, and if he transforms into a golem, Luffy can use Haki-infused Gear Third attacks to reduce his body to rubble.

5 Luffy Can Beat Daifuku If He Avoids His Genie

Daifuku Summoning His Genie To Fight Sanji

Daifuku is Big Mom's fourth child, and he has amassed a bounty of 300 million Berry while wielding the power of the Puff-Puff Fruit. The fruit allows Daifuku to summon a genie who wields a large halberd, and it assists him in battle.

The genie can grow to the size of a ship, and it's strong enough to overpower someone like Sanji. Thanks to his Haki and Gear Fourth transformations, Luffy should be able to avoid the genie so that he can attack Daifuku directly. If that happens, Luffy can unload a flurry of powerful attacks.

4 If Ulti Can Be Knocked Out By Big Mom, Luffy Can Knock Her Out Too

Ulti in Wano in One Piece.

As one of the Tobiroppo, Ulti is one of the strongest members of Kaido's crew, and she possesses one of the strongest Zoan Devil Fruit hybrids. Ulti's model allows her to transform into a Pachycephalosaurus, which explains why she likes to charge into a fight head-first.

In the manga, Ulti gets knocked out by Big Mom when the Yonko hits her with a powerful Haki-infused punch. When Luffy and Big Mom clash, the strength of their Armament Haki is pretty much equal, which means that Luffy should be able to knock out Ulti with one well-placed punch, too.

3 Snack Is Weaker Than Cracker, Who Luffy Has Defeated In The Past

Snack The Former Sweet Commander One Piece

The Big Mom Pirates currently have three Sweet Commanders, but there was a time when there were four. Charlotte Snack is Big Mom's 44th child, and he possesses a bounty of 600 million Berry. He lost his position when he was defeated by Urouge, who can convert damage he sustains into physical strength.

Cracker is Snack's older brother, and he is an extremely ruthless and powerful pirate with a 860 million Berry bounty. Cracker took Luffy to the limit, but the Straw Hat captain was able to eventually beat him with Gear Fourth. If Luffy can beat Cracker, then Snack shouldn't be an issue since he was the weakest of the commanders.

2 If Luffy Can Beat Katakuri, He Can Beat Smoothie

Smoothie's Anime Debut One Piece

Smoothie is another Sweet Commander, and she has nearly earned a 1 billion Berry bounty. She can use both Observation and Armament Haki, but she also possesses the Wring-Wring Fruit, which allows her to drain liquid from any living or non-living thing.

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Luffy was almost killed by Katakuri, who is the strongest member of Big Mom's crew, but he still managed to come away from the fight victorious. Smoothie may be strong, but her Devil Fruit and Observation Haki are nowhere near as strong as Katakuri's, so Luffy should have a much easier time fighting her.

1 Akainu Might Not Be Able To Handle Luffy's Conqueror's Haki

Akainu As Fleet Admiral

Akainu is the current fleet admiral of the Marines, which makes him one of the strongest characters Luffy has never fought. He is proficient in Observation Haki, and he is capable of using advanced Armament Haki. He also possesses a Logia-type Devil Fruit that allows him to create, control, and transform into magma.

It is true that Akainu's magma is capable of burning through just about anything, but at the end of the day, his Logia body cannot withstand Armament Haki. If that isn't enough, Luffy can now use an advanced form of Conqueror's Haki to make his body far more durable.

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