For Japan’s cellphone novelists, proof of success is in the print Reporting from Tokyo — She likes Care Bears, doesn’t wear makeup yet, and took her nom de plume from a character in the Disney classic “Bambi.” And last year, 15-year-old “Bunny” became one of Japan’s top authors of a genre called keitai -- cellphone -- novels. After getting its start as a tale told on tiny cellular screens, her th