Blue received Charizard as a Charmander in A Glimpse of the Glow. Although it was given as a starter Pokémon, Charmander was not Blue's first Pokémon, as he already owned a Scyther. Blue tried using him against Mew, but failed and withdrew his Pokemon, partly due to Red accidentally catching its attention.
At some point before Onix Is On!, Charmander evolved into Charmeleon, and was used against Brock in the Pewter Gym, which it apparently won, as Red states that he and Blue were the only ones to win the Boulder Badge. Charmeleon made another appearance in Sigh for Psyduck, trying to take down Koga of Team Rocket and his Arbok. He evolved once again, some time before Kalling Kadabra, and served a vital role in the final battle against Team Rocket Executives Koga and Sabrina, managing to defeat the latter's "Zapmolcuno" with Red's Saur and Green's Blasty. In the Pokémon League, he was used against Red's Venusaur, Saur, where he lost due to Red's Lightning Rod strategy.
In the Gold, Silver & Crystal arc, Blue lent Red his Charizard so he could make it across the ragged mountains. Red returned Charizard before the battle with the Masked Man in the Ilex Forest along with Blasty (which Green lent him). It was seen in Blue's possession again in the start of FireRed & LeafGreen arc. During the said arc, Blue took him to Kimberly where she taught him the ultimate fire attack Blast Burn, and because Red's Aerodoctyl had its wings ripped by Deoxys and had no means to fly, he was traded to Red again for his Venusaur, and for a short while the theme FireRed and LeafGreen is fulfilled (in the Japanese version). It was returned to its owner again shortly after the incident, but was petrified soon afterwards. Once freed, it helped defeat Guile Hideout's giant, fake Kyogre with the 8 other starters' ultimate attacks.
Moves used