Rin Chameleon (RinChameleon) is Mele's RinBeast from the villainous Rinjuken Akugata, making it a mecha from the antagonists' side: Mele is a master of the Confrontation Beast Chameleon-Fist, and her partner beast mirrors that exact style. At just 5.2 m tall and 200 tons, Rin Chameleon is the smallest of all the Juken beasts, but it makes up for that with stealth and cunning. Like a real chameleon it can fade into its surroundings to vanish from sight, and it wraps up opponents with a far-extending tongue – the Ringi "Bind Firmly" ties enemies down in an instant. Its big debut came in the theatrical movie "Nei-Nei! Hou-Hou! Hong Kong Decisive Battle," and later in the series (notably episodes 33 and 47), when Rio and Mele switch sides and join the Gekirangers for the "United Foes Juken Gattai."

Rin Chameleon's real appeal is in combination: together with Rio's RinLion and GekiTouja's three GekiBeasts, it forms GekiRinTohja, the "true form" of the Beast-Fist Giant in which both fighting styles – Geki and Rin – merge for the first time. RinLion attaches as upper-body armor and a sword, while Rin Chameleon mounts on the left arm and becomes a rope-gun. The combination's finisher is the "Geki Geki Rin Rin Zan," in which the upper body spins. Beyond that, Rin Chameleon also took part in SaiDaiGekiRinTohja and appeared as part of GekiRinToujaWolf in the Gekiranger vs. Boukenger crossover.

As a DX toy, Rin Chameleon was released by Bandai Japan as part of the Juken Combination Series – but never on its own, only within the "Juuken Gattai Special Rin Lion & Rin Chameleon Set," so both beasts shipped together. Rin Chameleon features projectile-shooting action as a rope-gun and, together with RinLion, docks onto the DX GekiTouja to upgrade it into a complete GekiRinTohja, including the spinning "Geki Geki Rin Rin Zan" gimmick. As a villain-side mecha the set is a distinctive collector's piece that stayed largely exclusive to the Japanese line. In Power Rangers Jungle Fury, Rin Chameleon corresponds to the Chameleon spirit of Camille, Mele's Western-side counterpart.