Charmander. I'm a Dragon-type Trainer, and Charizard is definitely used in the lineup a lot as a bit of a Wild Card. Say I have 4 Dragons in my party. Any combination of Salamence, Dragonite, Garchomp, Altaria, Flygon, Kingdra, and Hydreigon. I then usually add a legendary-type, like Dialga (whose types negate the Dragon moves' effectiveness on him) or Palkia (whose types negate the Ice effectiveness). But finally, I add Charizard. Why? He's a Fire-type, and the Dragons only weaknesses are to other dragons and the Ice-type. And since Charizard isn't a Dragon-type but can learn dragon moves, and is a Fire-type, it makes him ideal to include in a Dragon-based party.