Final Submission
Astrolitl
Fundamentally, it's a diminutive form of "Astrolotl" ("-lotl" → "-litl"), where "a lot" becomes "a little." The name itself is a mashup of "Astro" and "Little" under the framework of the word "Axolotl." In addition, the inclusion of "lit" in the name plays into its Fire typing.
(Note: I understand that there have been multiple similar submissions already, but I stumbled upon this idea without the foresight to check if it's already been done. For what it's worth, I would still like to offer my own favorite spelling. If it's too close to the others, feel free to remove it if necessary :)
Pronounced: "AS-tro-LIT-tul"