The Hoya Hoya no Mi is a Paramecia-type Devil Fruit that allows the user to summon a genie from their body, making the user a Lamp Human (ランプ人間,Ranpu Ningen?, Viz: "Lampman"). It was eaten by Charlotte Daifuku.
By rubbing their body, the user is able to summon a massive genie wielding a halberd to fight for them. The genie is immensely strong, able to briefly overpower even Sanji, an extremely powerful fighter in his own right. It is even capable of cutting through many Tarte ships in half with apparent ease. No weaknesses are known outside of the standard Devil Fruit weaknesses, although it does seem that the user needs to keep continually rubbing their body to maintain the genie. The genie, while possessing sentience and the ability to speak, may not give much consideration to its master's commands beyond direct orders, as it destroyed many of Daifuku's own Tarte ships that happened to be in its way. It also does not seem to grant the user itself any special abilities, meaning that without the genie they are completely normal.
Daifuku uses the genie summoned by this fruit to assist him in combat. The genie emerges from his belt buckle and attacks opponents with its halberd. While using his power, Daifuku continuously rubs his stomach. The genie also seems to have a consciousness of its own, as it generally asks permission from its “Master” before doing any kind of action.
Maji Giren (魔人斬 (マジギレン),Maji Giren?, literally meaning "Fiend Cut"): The genie attacks an opponent by slamming down his halberd on them. In the event that the opponent is able to block the halberd's blade, the genie will then slam the halberd's shaft into them horizontally with considerable force, sending them flying back. This was first used against Sanji. The attack name is a pun on the normal reading of the kanji Majin Giri (魔人斬,Majin Giri? "fiend cut") and Japanese slang Maji-gire (マジギレ,Maji-gire? "seriously pissed off"). In the Viz Manga, this is called Genie-uine Rage Split.
Majin Saidan (魔人細断 (マジンサイダン),Majin Saidan?, literally meaning "Fiend Shredding"): The genie swings his halberd down at his opponent with great force. This attack is strong enough to cleave a Tarte ship in half. It was first used against Carrot. In the Viz Manga, this is called Genie Guillotine.