This episode uses clips from past episodes to form a montage of Charizard when it was Charmander and then evolved to Charmeleon and again into Charizard.
This episode is somewhat of turning point for Ash and Charizard. After this episode Charizard became obedient like when it was a Charmander and also won many important battles for Ash later, also Ash admits that he wasn't great trainer and somewhere after this episode he became more mature trainer
There's an error in this episode: when Charizard is preparing to use Dragon Rage on Team Rocket, Ash is without his jacket and hat. However, when the scene cuts back to him after Team Rocket blasts off, Ash is wearing them.
The "Who's that Pokémon?" in this episode is caterpie.
"I'll be glad to have a rematch with you Ash, when you finally learn how to tame that thing."
Tad about Ash and his Charizard.
"We've been together ever since you were Charmander and then when you evolved into Charmeleon. I just want to be a good enough trainer for you."