Evolution by Leveling

If a pokemon has 2 stages of evolution (Basic and Evolved), the pokemon will evolve at Lv.12 (204,800 Glory)

If it has 3 stages of evolution (Basic, Evolved and Complex Evolved), the pokemon's first evolution will be at Lv.11 (102,400 Glory), and it's second at Lv.14 (819,200 Glory)

Evolution by Stone

If a pokemon evolves by a Stone (Fire, Water, Thunder, Leaf, Sun or Moon), simply post in the evolution & items forum, stating your intent t evolve the pokemon.

Evolution by Happiness

If a pokemon evolves by happiness in the original pokemon games, since the pokemon has no trainer, you will have to use an Joy Orb (now available from your local newsagent. Well... shop).

Evolution by Beauty

If you have a Feebas, you will need to visit the mirror of Eternal Beauty in Zylonto.

Evolution by Time/Stats/Gender

If you have an Eevee, and you use a Joy Orb on it (to max. it's happiness), you can choose whether it is an Espeon or Umbreon.
If you have a Tyrogue, you may choose whether it becomes a Hitmonchan, a Hitmonlee or a Hitmontop.
If you have a Wurmple, you may choose whether it evolves into a Silcoon or Cascoon.
It's choice all the way!

New Evolution Methods

I have not plated Diamond/Pearl (because it hasn't come out here yet), so if anyone has info about the new evolution method, your help would be appreciated.