Rahaga was the name given to six former Toa Hagah who were transformed by Roodaka into shrunken, bent creatures with the heads of Rahkshi. The Rahaga were Norik, Pouks, Bomonga, Iruini, Kualus, and Gaaki. Roodaka coined the term as a play on the words "Hagah" and "Rahkshi." The Rahaga were partially Rahi and had enhanced senses and agility as a result. Each carried a staff and had a Rhotuka launcher as part of their anatomy[1, 2], which was their primary offensive and defensive tool. The Rahaga continued to oppose Roodaka and the Visorak, making every effort to rescue Rahi before the Visorak could capture them.
From out of the shadows of Metru Nui came the mysterious Rahaga, weird figures combining the wisdom of skilled hunter/trackers and the animal instincts of Rahi. Only they were able to help the Toa Hordika master their new powers and control the savage beasts within. Using their Rhotuka spinners, the Rahaga captured wild Rahi to keep them safe from the rampage of the Visorak hordes.
The Rahaga were utterly determined to stop the Visorak hordes because of the destruction they caused.
Keetongu could not cure the Rahaga because they weren't mutated by Visorak venom.