Charmander - The Stray Pokémon

Pokemon: On the way to Vermilion City, Ash, Misty, and Brock come across a Charmander sitting on a rock. Ash tries to catch it, but it turns out it has a trainer and can't be captured, so they head to the Pokemon Center. At the center, a hotshot trainer named Damien is bragging about how he left it, promising to come back for it. After hearing this, they head back out to get the poor pokemon as the rainstorm threatens its very life.