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.
Chompy actually alludes to the character "Snappy Warhol", the sidekick of Terrorpin whom Tokka was based on.