Eevee

Eevee is known as the Evolution Pokémon. It has seven different evolutions (not all in a row, you must choose one or the other), two of which have been recently added in Pokémon Diamond and Pearl. The evolutions you can choose from are: Vaporeon, Jolteon, Flareon, Espeon(added in Pokemon Gold and Silver), Umbreon(added in Pokemon Gold and Silver), and the two recent ones are Leafeon and Glaceon. The first three evolutions,Vaporeon, Jolteon, and Flareon are based on what stone you give your Eevee. The next two evolutions, Espeon and Umbreon, are baised on Eevee's happiness and the time of day (Umbreon at night, Espeon at day). The last two evolutions, Leafeon and Glaceon, are baised on where you train your Eevee.