I think for the most part, it's safe to assume most people know what the different Pokemon look like. So unless they are important to the main plot (like if they're one of the Pokemon that the Trainer gets, or one of the ones they directly battle against), you are probably safe with just their names and maybe a general description of what they're doing. Of course if there really are any doubts, my rule is always 'There's no such thing as too much description'.
Last edited by SBaby; 15th December 2012 at 9:18 PM.
Rules of fansites:
1 - You can either be right, or you can be happy.
3 - If you think someone is lying about being an expert, they are.
5 - If you think someone is lying about knowing people who work in the industry, they are.
14 - There's no such thing as a source that isn't one-sided.