Pokemon FireRed and LeafGreen Have 10 Pokemon You Can Only Get by Trading

In Pokemon FireRed and LeafGreen, there are 10 Pokemon that are only obtainable through trading. The vast majority of Pokemon evolve simply by reaching a certain level, but there are many other Pokemon that can only evolve under certain conditions. Sometimes Pokemon FireRed and LeafGreen players have to use stones on these Pokemon to trigger their evolutions, but other times the Pokemon can only evolve through trading.