BMGF has a large number of smilies for you to use to express yourself in your posts. There are standard smilies, Pokémon (Gens 1-3), TCG, anime, manga, badges (Gen 1 only), medals, and even Game Boys! Just be sure not to over do it with them in your posts.

You can find the full list here, or on the righthand bottom side of the page when you're replying to posts or are in any section.