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The Funchucks are giant nunchucks that are attached to both of Rex's arms. He can spin them at incredible speeds and then launch them at once. Rex can also use them to generate a destructive energy pulse, allowing him to shoot bolts of energy at his enemies. The Funchucks appear to be an upgraded version of the Smack Hands, as Rex uses the Funchucks in the same manner. Additionally, when Rex was juiced up, his Smack Hand disassembled and reassembled on one arm as the Funchuck. Rex could also use the Funchucks as a giant flashlight to see in the dark.