Essentially, at this point in time, Luffy had officially become Joy Boy due to the Awakening of the Devil Fruit and the return of Gear 5, which essentially ... and his ability to laugh and spread ...

Joy Boy's puzzling actions, including his attempt to raise the colossal Noah with the aid of Poseidon, and his bequeathal of a treasure on the legendary Laugh ... Luffy first awakened Gear 5 ...