Comet

Comet is Luke's Charizard. She claims to have grown up in the Volcano Area of Pokémon Island, until one day, she was suddenly blipped to the middle of a frozen Hoenn desert, along with various other fire Pokémon, in secret by Mew, who hoped that the heat that they generated would be enough to thaw the frozen area. They weren't.

After wandering around, confused but not really perturbed by the strange situation she had found herself in, she eventually ran into a human named Luke and his part of Pokémon, and informed then of the her and the fire Pokémon's situation. After spending a little while talking, Comet began to secretly grow to like one of the trainer's Pokémon, a meek Sceptile called Treeo.

Agreeing to call someone to take them home once they got to Fallarbor town, Luke and his Pokémon left, leaving Comet to think while she waited to be taken home. For some reason, no matter how much she tried, she just couldn't forget about Treeo for some reason.

A few days later, after being loaded up on a PEFE airship to be taken back to Pokémon Island, Comet was surprised to see that Luke and his team had came back to see her. After a short conversation in which she explained to them that life on Pokémon Island was rather...well, dull, Luke asked if she wanted to join his team. An offer she happily accepted.