Tokka is supposed appear in the episode The Ever-Burning Fire, as a rock and lava type creature, likely the guardian watching over the third and final piece to the blackhole machine. Raphael is supposed to recieve a new pet in that episode as well. An alien turtle he'll call Chompy.
(Gasp) An alien turtle!? Are you serious!?
I don't know if it will be the same as that episode. Remember that this world is called Magnamar, so it's mostly a volcanic place. It's not the Shang-Li-Ra of the 1987 series. Yes, there will be alien turtles on it, Tokka and Chompy are proof of that, but I have no idea what other alien life they find in this hotspot. Guess, we'll just to see the episode to find out.
Found nothing on tokka and chompy.