Fang has an ability called the "Shadow Shield".
Overview
He used it to protect himself when BoBoiBoy Quake attacked him with his Earth Power Punch and escape in Season 2, Episode 2.
In the end of Season 3, Episode 1, Ejo Jo, who had stolen Fang's Power Band, used this ability to trap BoBoiBoy, Yaya, Ying, Gopal and Adu Du, who was inside the Mukalakus.
In Season 3, Episode 2, Iwan, using Gopal's Power Band, transformed the Shadow Shield into coconut skin to free them.