Didn't you watch the first animated series of Pokemon!? Ash let's his Charizard become too powerful in relation to his skill as a trainer, and as a result the Charizard becomes wilful and recalcitrant during battle, thus providing a source of humour for the audience and humiliation for Ash throughout the series. Eventually Ash proves himself a worthy trainer and he and Charizard become close friends, and Charizard an invaluable part of his important battling team.
/sighs impatiently
Didn't you watch the first animated series of Pokemon!? Ash let's his Charizard become too powerful in relation to his skill as a trainer, and as a result the Charizard becomes wilful and recalcitrant during battle, thus providing a source of humour for the audience and humiliation for Ash throughout the series. Eventually Ash proves himself a worthy trainer and he and Charizard become close friends, and Charizard an invaluable part of his important battling team.
DUH.