yes, lots of things are improved in crystal
you have the battle tower, you can be a girl or boy, being a girl changes most of the red on your normal boys screen to blue...the elite four arenas are upgraded and much more official looking, get suicune easily, and including the chase for him with eusine who's a new person and loads more...
Join this site...http://s14.invisionfree.com/ChaoticRoleplayRealm/index.php?
and this one...http://gameknot.com/?rfr=diezombie...when you sign up the second one, where it says referals by, type in diezombie