Transformation Technique (Earth-2356)

The Transformation Technique allows the user to take the appearance of whatever they choose.

This technique is most often used to disguise the user as another person, but they can also turn into a creature, plant, or inanimate object. Users will gain the attributes and physical features of whatever they transform into, such as a weapon's sharpness or an animal's fangs. To be able to assume so many different forms makes this technique invaluable for not just combat, but intelligence gathering and diversionary tactics as well. Some transformations are known to take some getting used to, such as if the assumed form has a different height than the user or if the assumed form wears clothes that the user isn't accustomed to.

Source

 * https://naruto.fandom.com/wiki/Transformation_Technique