The end of a Charmander's tail is alight with a flame, and the flame's size reflects both the physical health and the emotions of the individual. When it rains, steam is said to spout from the tip of its tail. If the flame were to ever go out, the Charmander would die. When Charmander receives enough experience from battles, it evolves into Charmeleon (at level 16 in the video games), and later Charizard. With the help of the Mega Stone, it can further Mega Evolve into Mega Charizard X/Mega Charizard Y. The idea to feature Charmander and the other "Red" and "Blue" starters in a significant role in "Pokémon X" and "Y" came about a year and a half into the development of the games. The Mega Evolutions for the three Pokémon's final forms were created, and the designers decided that they should give players an opportunity to find one of these Pokémon in order to see their Mega Evolved form.