Kopi Kopi no Mi

The Kopi Kopi no Mi is a Paramecia-type Devil Fruit that allows the user to copy other people's abilities with an unknown method. "Kopi" is short for "Kopī" (コピー), which means "Copy". It was eaten by Chameleone.

Strengths and Weaknesses
The main power of this fruit is to copy other people's abilities and appearances through a currently unknown method.

This fruit doesn't seem to have any specific weaknesses, aside from the standard Devil Fruit weaknesses.

Usage
Chameleone uses his power to disguise himself as somebody else and uses their power for his own sake. Some of the devil fruit users he can copy are Smoker, Ace and Kizaru.

Trivia

 * This fruit is similar to Mane Mane no Mi, both can copy or imitate something from someone else.