Keetongu

Keetongu were a type of Rahi. They have the extremely useful ability of reversing temporary Hordika Venom. They lived on a faraway island where they rode Tahtorak as mounts. They are sentient, and their natural enemy seems to be the Visorak.

However, for some reason, they all died out, save one, who journeyed to Metru Nui to find a new home. It arrived during the time Dume was still Toa, and took refuge in Ko-Metru, living in a freezing pond of water. No one bothered his peaceful existence. However, the Toa Hagah Norik had always heard of such legends during the Toa/Dark Hunter War. When he was mutated by Roodaka under the order of the Makuta, he and the now-Rahaga escaped to find him, without success.

Keetongu remained in his icy domain until Norik, now leading the Toa Hordika, arrived in the cold abode following an ancient riddle from the Great Temple which Gaaki had decyphered. Keetongu did not approve of using his powers to turn the Hordika back into Toa Metru, but did agree to help them defeat the Visorak. At the Battle of the Coliseum, whilst the Hordika fought the Visorak at the battle arena and Matau fought Vakama, Keetongu was trying to climb to the top of the structure to destroy Sidorak and Roodaka. Roodaka noticed the yellow being, and shot him with her claws. She urged Sidorak to go down and finish the Rahi off.

Sidorak reluctantly agreed, and went down an elevator to confront Keetongu. After disapproving of delivering the final blow, Roodaka walked away, leaving Sidorak to be crushed by Keetongu's massive fists. After the Battle was over, he stayed behind on Metru Nui when the Toa Metru (whom he agreed to change back, finally) left with the Matoran, helping the Rahaga rebuild the great city for when the Matoran were to return.

Morphology and Abilities
Keetongu are covered in yellow armor which can withstand extreme kinetic energy. They have one eye which is capable of seeing the good and bad in a being, although this may be just the trait of the Keetongu encountered in Bionicle 3: Web of Shadows. This ability makes the Keetongu ultimate descision makers. They speak their own language, which Norik understands perfectly. They also have the power to reverse temporary mutations down by Hordika Venom, but cannot do anything with permanent mutations. One of their hands is a fine manipulator, the other is a heavy manipulator, with two enormous round fingers on it, which they can use to absorb the force launched at them, then transfer that power to a Rhotuka spinner hidden inside a chest cavity. For example, if someone uses a fire attack on them, they absorb it with their shields then fire a Rhotuka spinner with the power of fire back at the enemy.