Alexander Anderson Jr., a pioneer television cartoonist who created the landmark duo of Crusader Rabbit and Rags the Tiger and two of TV's most enduring characters, Rocky and Bullwinkle, has died. He was 90. [...] The nephew of Paul Terry, whose Terrytoons cartoons included "Mighty Mouse" and "Heckle and Jeckle," the Berkeley-born Anderson had apprenticed at his uncle's studio in New Rochelle, N.Y., as a young man before serving in World War II and returned to work there after the war. [...] Anderson then teamed up with his childhood friend and former UC Berkeley fraternity brother Jay Ward, who had...