Charizard

Charizard is a Fire/Flying-type Pokemon and the final evolution of Charmander. In the anime, Ash Ketchum owns a Charizard he obtained when it was a Chamander. But when it evolved, it became very diobedient towards his trainer. But after healing it and helping it recover, he has earned his trainer's trust and began to obey his trainer like it did before. Ash left Charizard to train in the Charicific Valley where it will become strong and powerful, Later, Ash switched Unfezant to meet Swellow and Staraptor, and he was given his Charizard back, and his Pokemon is to introduce Charizard.

Trivia

 * Benny the Beast also has a Charizard, which he nicknamed Smokey.
 * Spectra Phantom has a Charizard as well, a shiny one that can talk, sounding exactly like and named after his trademark Bakugan, Helios.
 * Elsa the Snow Queen also has a Charizard that can mega-evolve into a Mega Charizard X through the power of the Mega Stone she received from the Grand Pabbie. Elsa would mostly use Charizard as a mode of transportation and would mega-evolve on rarest occasions. For instance, when she, Kristoff, her friend Malamar, and her sister, Princess Anna, are helping Clemont and James rescue their friends from the three evil Malamar that plot to destroy the world, she mega-evolves her Charizard to teach them a very painful leasson they'll never forget.
 * Charizard can mega evolve into two different forms. When it mega evolves into Mega Charizard X, it changes its type into a Fire/Dragon-type. However, it keeps its original type when it is a Mega Charizard Y.