Ash's Charizard/I Choose You!

Charizard appeared in I Choose You!, which is set in a different continuity from the main series. In this continuity, it was the second Pokémon caught on his journey.

As a, it originally belonged to a Pokémon Trainer named Cross. Cross deemed Charmander too weak however, and abandoned it and told it to stop following him. Charmander was eventually found in the rain by Ash and Verity. After arguing briefly with Cross over his decision to abandon Charmander, they took it and went inside a cave to seek shelter from the rain. There, they found Sorrel, who brought Charmander back to good health. The following day, Charmander had fully recovered and Ash offered it to join his team. Charmander accepted, despite still feeling loyalty towards Cross. Charmander joined Ash, Verity, and Sorrel on their journey towards the Raizen Mountains to meet. After a battle against a 's, Charmander evolved into Charmeleon. Soon after, Ash encountered Cross again and started a battle with him. Ash used Charmeleon against its former Trainer and his. Charmeleon proved to be no match for Incineroar however and was defeated. Ash started to question himself and faulted the loss on Charmeleon, but later apologized when he realized his errors.

Finally reaching the Raizen Mountains, Ash tried to place his Rainbow Wing atop Rainbow Rock. He was stopped by Cross however, who wanted to take the Rainbow Wing for himself. Ash battled Cross again, once again using his Charmeleon against Cross and his Incineroar. In the midst of a fierce battle, Charmeleon evolved into Charizard, and this time, it managed to defeat it. Distraught of losing against his former Pokémon, Cross started to realize the error in his ways.