Aqui tienes unos bastante completos:
http://thepokemonchronicles.deviantart.com/art/Pokemon-Diamond-Pearl-Tileset-112889591
http://www.google.es/imgres?q=tilesets+diamond&um=1&hl=es&sa=N&biw=1440&bih=769&tbm=isch&tbnid=eJtpzy9CK8cU0M:&imgrefurl=http://gamearth.es/foro/thread-272.html&docid=WCvaIWeI4icGpM&w=128&h=544&ei=vb1rTt_MEKiB4ATAqojyBA&zoom=1&iact=hc&vpx=1247&vpy=14&dur=538&hovh=170&hovw=40&tx=125&ty=228&page=1&tbnh=170&tbnw=40&start=0&ndsp=32&ved=1t:429,r:8,s:0
http://wahackforo.com/t-Aporte-Tileset-Completo