Ok Justine. I have made the couple infobox as well as the gallery pages. You can start filling them immediately. Do note that if you don't fill them or fill them incompletely and leave then the pages will be deleted.
What if the page really gets long (like Gwevin), should I use the GallerySubs template? There's only one pic for Classic Ben 10 and for Julie and Ben nothing. Should I just leave it as a very long page?