Flamethrower is similar to ember except it is slightly slower, varies in colours and is for some reason the same strength as Ember. It is unusually strange as he is the final form.
Firespin is a move that has to be used with your enemy very close in range. In fact right next to you! The attack forces your user to spin around 5-8 times with a lava circle around you. Anybody inside the circle but the user will get damaged. It is a really effective move.
Charizard does not evolve into any pokemon.