|Colors||Unknown (when angered, their mane turned white-hot)|
|Weapons||Their teeth and claws|
Toa Lesovikk once tried to kill a wounded Rock Lion to put it out of its misery. However, the battle lasted for three days and the Rock Lion still won, from which Lesovikk learned that a wounded foe did not mean an easy fight, or that victory was guaranteed at all.
- BIONICLE: Rahi Beasts (Mentioned only)
- BIONICLE: Encyclopedia (Mentioned only)
- BIONICLE: Encyclopedia Updated (Mentioned only)
- Dreams of Destruction (First appearance; Mentioned only)
- The Rock Lion was a winner of the Lego Magazine 2005 Rahi Building Contest; however, the builder (it is unknown who this person is as his or her name was not said and it is unknown if the name is list among the other winners of the 2005 contest) did not submit a photo of the Rock Lion model for an official photo for the BIONICLE: Rahi Beasts book and so the Rock Lion was reduced to being mentioned (in the book and later in an online story).