The following description of Charizard came from Wikipedia so you know.

Charizard, known in Japan as Lizardon (¥ê¥¶©`¥É¥ó Rizadon?), is a Pok¨¦mon species in Nintendo and Game Freak's Pok¨¦mon franchise. Created by Ken Sugimori, Charizard first appeared in the video games Pocket Monsters Red and Green and subsequent sequels. They have later appeared in various merchandise, spinoff titles and animated and printed adaptations of the franchise. Shin-ichiro Miki, the actor who voices James in the original Japanese version of the Pok¨¦mon anime, voices Charizard in both the Japanese and English-language versions of the anime.

Charizard is featured in the Pok¨¦mon anime series with the most recurring being from the main character, Ash Ketchum. It is featured in printed adaptations such as Pok¨¦mon Adventures, in the possession of Blue, one of the main characters. Red is also shown to have a Charizard, in Pok¨¦mon Origins, which he received from Professor Oak as his starter when it was a Charmander. Charizard has received positive reception from the media, with GamesRadar describing it as "hands-down one of the coolest Pok¨¦mon out there". Charizard is the version mascot of Pok¨¦mon Red and FireRed versions, and makes an appearance on the boxarts of Pok¨¦mon Stadium, Pok¨¦mon Ranger, Pok¨¦mon Mystery Dungeon: Red Rescue Team, and Pok¨¦mon Mystery Dungeon: Explorers of Sky.

Charizard is the evolved form of Charmeleon, which in turn, is the evolved form of Charmander.