Charmeleon is Charmander's evolved form in Pokemon. Since I always pick water-types as my starter, I never had much chance to use him personally. My next door neighbor did though.
I remember him best in the anime, when he evolved for Ash. When that happened he was uncontrollable and rotten. He didn't respect his master until much later on.
His original Japanese name is リザード (Rizado) which is a corruption of the Japanese spelling for the English word "lizard".