So far only one Artificial Mythical Zoan power has been shown in canon: Artificial Devil Fruit: Eaten by Kozuki Momonosuke.
The Hito Hito no Mi is a Zoan-type Devil Fruit that allows its user to transform into a human hybrid or a human at will. It was eaten by the reindeer Tony Tony Chopper, turning him into a Human Reindeer (人間トナカイ, Ningen Tonakai?).
The Tori Tori no Mi, Model: Phoenix is one of the most powerful Zoans in the story and it was eaten by the former First Division Commander of the Whitebeard Pirates, Marco. This Devil Fruit grants the incredible power to turn into a Phoenix and heal from any damage taken in battle.
To everyone's surprise, Luffy, who was always believed to be a user of the Paramecia type Gomu Gomu no Mi, is actually a user of a Zoan type Devil Fruit. Furthermore, this isn't just any Devil Fruit, but a power described to be "the most ridiculous" to exist in the entire story.
Mythical Zoan-type Devil Fruits are the rarest subtype of the Zoan class in the One Piece world. Thought to be even rarer than the Logia types, the Mythical Zoan-type Devil Fruits offer quite interesting abilities that allow the users to turn into a mythical creature or their hybrid at will.
All these Zoan powers were awakened, as explained by Sir Crocodile, one of the Shichibukai. Although their awakening wasn't shown in detail, they were said to have an extremely high recovery rate, along with much higher strength and speed in combat.
Pobably because he can't sleep or else he would die. This allows him to eat 2 fruits.
Yamato ate the Inu Inu no Mi, Model: Okuchi no Makami, a Mythical Zoan-type Devil Fruit that allows him to transform into a divine wolf, as well as a human-divine wolf hybrid. According to Kaidou, this beast is a "Guardian Deity of Wano Country".
Zoro and Sanji's Fruits aren't as directly connected to their characters. Zoro would receive Kaido's Mythical Fish Fish Fruit, which enables its user to turn into a dragon and Sanji would receive the Swim Swim Fruit, which enables its user to swim through solid surfaces like the ground.
4/4 Hito Hito no Mi
The Hito Hito no Mi was eaten by none other than a doctor of the Straw Hat Pirates, Chopper. This Devil Fruit is incredibly useful for the reindeer as it gives him the powers of a human.
The Hito Hito no Mi, Model: Nika was first revealed to the fans in the very first chapter of the story. Luffy ate the fruit thinking it was dessert and gained the power of rubber ever since. The fruit was actually in possession of Shanks and according to his crew, they stole it from an enemy ship.
The Hito Hito no Mi, Model: Daibutsu is a Mythical Zoan-type Devil Fruit that allows its user to transform into a Daibutsu (a giant gold Buddha) at will. It was eaten by Sengoku, the former fleet admiral of the Marines.
One of the most theorized powers that Monkey D. Dragon is thought to possess is the power of the Wind Wind Fruit or an ability that is related to wind.
Sengoku transforms with his Devil Fruit. Sengoku ate the Hito Hito no Mi, Model: Daibutsu, a Mythical Zoan-type Devil Fruit that allows him to transform into a giant golden Buddha and a human-Buddha hybrid at will. This power is the source of his nickname, "Sengoku the Buddha".
Luffy made his debut as a young boy who acquires the properties of rubber after accidentally eating one of the devil fruits the Gum Gum Fruit, originally known as the Human-Human Fruit, Model: Nika.
Nope, only the first one can have its ability.
The fruit deemed Luffy as a worthy successor to Joy Boy and wanted to test him. In the Wano Country arc, Luffy lived up to the expectations as he managed to awaken his Devil Fruit. In doing so, he has now become the next Nika and the successor to Joy Boy himself.
The Gomu Gomu no Mi which is also referred to as “Hito Hito Model: Nika” It is a Mythical Zoan-type Devil Fruit that enables the user's body to stretch, making the user a rubber Human (ゴム人間 Gomu Ningen).
Rob Lucci was recently revealed to have awakened his Zoan devil fruit. Rob Lucci is one of the biggest antagonists in Eiichiro Oda's One Piece.
Evidently, the Gomu Gomu no Mi carried tremendous potential. Once awakened, it will make Luffy much stronger than he is currently, regardless of whether the fruit's awakening is special or just the standard Devil Fruit awakening that fans are used to seeing.
9/10 Weakest: Hito Hito no Mi
This Devil Fruit grants him the abilities of a human, and although they're useful for him, a reindeer, they'd be useless for a regular human.
The Mizu Mizu no Mi is a Logia-type Devil Fruit that allows the user to become, create, and control water. This turns the user into a Stupid Person (Baka Ningen). "Mizu" is the japanese word for "water".
The devil fruit is said to have the highest offensive among all the Logia-type devil fruits.