Smoker has eaten the Moku Moku no Mi, a Logia type Devil Fruit which allows him to create, control and become smoke. He can manipulate the smoke's density to make it thick or thin, allowing him to hold and constrict others within it. He can fly by turning his lower body into smoke and propelling himself like a rocket.
At this point, he doesn't appear to have any exploitable weakness (aside from the standard Devil Fruit weaknesses), due to his ability to be intangible.
With his current mastery over his powers, the only reliable way to injure Smoker is through the use of Haki, as Hancock did during their short battle, or through the standard Devil Fruit weaknesses.

When Lucci (ロブ・ルッチ, Robu Rucchi) is first seen as one of the five foremen of Galley-La Company's Dock One, he appears to be a ventriloquist using his pigeon, Hattori (ハットリ, Hattori), to speak for him. He also shows very impressive skills when he gets into a fight with Paulie and, later on, Luffy. It is soon revealed he is the unquestioned leader of the Water 7 CP9 unit which infiltrated the Galley-La company, and perfectly capable of speaking for himself. Lucci ate the Neko Neko no Mi, Model: Leopard (ネコネコの実 モデル豹(レオパルド), Cat Cat Fruit, Model: Leopard ), which allows him to turn into a huge leopard-human hybrid and a full leopard. This coupled with his mastered martial arts style of rokushiki, makes him a resilient foe, and he has been ranked as the strongest CP9 agent by far. Lucci can perform Life Return, like Kumadori, and use it to alter his body into forms that amplify his skills in a specific rokushiki ability, though only Kami-e Form, which makes his man-beast form smaller and thinner, has been seen. He is currently twenty-eight years old, and arguably the main villain of the Enies Lobby Arc if not the main threat to the Straw Hats at the time.

In the anime, Lucci's backstory to his admission in CP9 is revealed by a Vice Admiral during the Buster Call on Enies Lobby. Fifteen years prior, a kingdom had 500 of its soldiers and its king taken hostage by a pirate crew, with the captain demanding to be made the new king of the kingdom. As the government saw the king beginning to admit defeat, they sent in the then thirteen year-old Rob Lucci, who mercilessly killed all 500 hostages to get to the captain, whom he killed without mercy. During this incident, he gained a back full of scars from the pirate crew's guns, vaguely scarred in the shape of the World Government's symbol. Shortly after that he became a CP9 member, and gained the reputation of being the group's most cold-hearted and efficient assassin in its entire history. As such, he is a very valuable asset to the World Government, almost to the point of legend; the other vice admirals believe that he can even survive a Buster Call attack.

At the Galley-La headquarters in Water 7, Lucci effortlessly defeated Luffy in a relatively short fight. Later in Enies Lobby, Luffy chased after Lucci and initiated a second fight with him. The two engaged in an extremely long, hectic and boisterous fight in which Luffy eventually emerged victorius. Lucci respectively bested, withstood and survived Luffy's attacks and various states until he was defeated. However, it took Luffy's last bits of energy to defeat him, as Luffy was in the floor and couldn't even move. This proves how much of a monster Lucci was, but also how much stronger Luffy has become.

Lucci comes off as the most cold and collected member of CP9, almost never displaying any emotions. An example is the brutal assault on his friend of five years, Paulie, whom he even tried to kill after the CP9's identities have been revealed. He also states that he feels no real bond with the city he's lived in for those five years. He also seems to have no feelings for his fellow CP9 colleagues, least of all Spandam. His emotionless nature includes anger and distress (he's "kept together" all through his fight with Luffy, unlike all the previous villains). Even while taunting or demoralizing Luffy, he keeps a passive face, and refrains from the classic "villain laugh". However, during the final moments of his fight with Luffy, he expresses surprise and anger prior to being defeated.

He seems to derive amusement and gratification from inflicting physical and emotional pain on others, making him a typical sadist. These scenes, along with when he anticipates battle, are the only times where he smirks. In Enies Lobby, he reveals that he works so he could be legally allowed to kill people. An example of Lucci's lust for violence is when he compromised the mission of bringing Robin to the Gates of Justice by allowing Luffy to tail him, for the sole purpose of having a battle. Lucci's violent and predatory nature is also shown when he goes into full-beast mode during battle, in order to attack Luffy more violently.

However, while Lucci does love the benefits of his job (killing people), he seems to be completely devoted to the government he serves as a tool from the shadows. He speaks of pirates as "evil", and sees it as his duty to hunt down and eliminate Nico Robin. All this is revealed towards the end of his battle with Luffy, and is a sudden departure from his "care for nothing but blood" attitude. This may be because he was dominating the fight at the time, and his bloodlust, which otherwise overshadows his better judgement, had worn off since Luffy was no longer fun to fight. However, as his flashback in the anime shows, this moral isn't just limited to pirates. If Lucci sees anybody that he believes faulters in the face of justice, they have "sinned" in his eyes and must be eliminated. This is his own sense of justice which he calls "dark justice".

Lucci also appears to exhibit a rather high level of intelligence. It was he who deduced the connection between Iceburg and Franky, figured out the principles behind Luffy's Gear 2nd "upgrade", and showed extensive knowledge about Devil Fruit. On Enies Lobby, he even effortlessly jeopardized the lives of Luffy's crewmembers and friends, as well as their mission to save Robin, by flooding the underwater passageway to the Gates of Justice. Although this might just as well be yet another display of sadism, where he removes Luffy's chances of "having everything" just for the sake of angering him.

Lucci has a complete mastery of Rokushiki, having not only used at least one or more moves from each of the different forms with ease, but to such an extent that he can mix two or more forms together to great effect. He demonstrates this when he unveils the Rokushiki hidden technique, Rokuougan, during his fight with Luffy. The massively powerful technique, usable only by one who has literally mastered all six forms as stated by Lucci himself, is so strong that it causes severe internal injury to Luffy's body; no small feat considering he has a rubber body. Luffy described it as if an 'Impact Dial' with much more greatly amplified power went off inside his chest.

Not much is known about Hattori, the pigeon that is constantly seen perched on Lucci's shoulder. It appears to have no special significance. While acting as Lucci's voice Hattori expresses human body language, matching the behavior of a professional shipwright: constantly insulting and lecturing Paulie because of his reckless lifestyle. After the CP9 reveal their identities, Hattori loses many of his human characteristics, although he is seen wearing a coat and drinking from a cocktail glass. Hattori seems to have affection for his emotionless and bloodthirsty master, as seen when he flew to Lucci's unconscious body. He also seems to leave his master when he enters any sort of battle, returning directly afterwards. Hattori's name presumably comes from combining the Japanese word for pigeon, hato (鳩) with the word for bird, tori (鳥).

Enkai (炎戒 Flame Commandment?): Ace amasses a large amount of flames around his body (usually by first swinging his outstretched hand around him, summoning the flames) in preparation for an attack. This is apparently the prerequisite technique before Ace can use Hibashira. In the FUNimation dub, this technique keeps its original name, and in the Viz Manga, this is called Flame Commandment.
Hibashira (火柱 Fire Pillar?): Used following Enkai,. Ace shoots the collected flames straight upward, destroying a target above him. It can also be fired downwards to clear any enemies that might be below him while he's in mid-air.
Hotarubi (蛍火 Firefly Light?): Ace creates many small, glowing greenish yellow fireballs that float around an enemy. The idea behind this attack's name is that before he attacks with them, the small fireballs look like fireflies in the air. This move is apparently used in preparation for Hidaruma and was first seen in Ace's battle against Blackbeard. In the Viz Manga and FUNimation subs, this is called Firefly.
Hidaruma (火達磨 Fiery Doll?): After using Hotarubi to send the fireballs floating around in proximity with the enemy, Ace sends them all flying into the target(s) all at once, burning them. This was first seen being used in Ace's battle against Blackbeard after Blackbeard performed his initial attacks.[7] In the Viz Manga and FUNimation subs, this is called Fiery Doll.