Kualus does appear in the Cyclic Plane Storyline, though his role in it barely differs from canon.
Like Toa Norik and Toa Iruini, Kualus has special metallic armour over a 2004-style toa build, a staff weapon and a shield with a rhotuka spinner in it. Chose to use some newer parts for the mask and armour, since they definitely would have been released with unique new pieces for that if they had been released as sets.
Due to Kualus’ love of bird rahi, I chose the mask and extra feathery details to hopefully somewhat resemble an owl. He has jet-propelled winglets to allow him to fly.
Kualus’ blade and shield can be stored on his back.
As a Rahaga he could blow through his staff and play it like a flute to summon bird rahi or warn them of danger. I don’t see why he couldn’t have done the same as a toa as well!
The Smoke Hawk doesn’t have a canon appearance or much information on it, but I built one (possibly a fledgling, here) to go along with Kualus as a companion.