[quote=@Dusksong]
[@balthazar007] Um so I don't think the rank explanations specify when trainers can start evolving Pokemon that only evolve once? I'm going to assume that it's when they become expert trainers?? Haha it'd be really nice if Shanae could evolve her Houndour though ^_^'
[/quote]

Please look at the opening OOC post a little closer, specifically in the "Levels & Evolution" subsection located within the "What about the Pokemon?" section. The last paragraph of that section states that you can evolve a Pokemon as early as you like... but evolving a Pokemon too early will make it unusable in battle and uncontrollable by your character in regular IC posting. 

Picture Ash and Charizard in season 1 of Pokemon. You and your Houndoom would have a similar relationship.