 how many na -350- with title and source being bokumo sekai wo sukuitai: battle tournament
CREATE TABLE "table1_13663434_1" (
  "title_and_source" text,
  "developer_s_publisher_s" text,
  "jp_210" text,
  "na_350" text,
  "pal_295" text,
  "wii_points" text
);
SELECT COUNT("na_350") FROM "table1_13663434_1" WHERE "title_and_source"='Bokumo Sekai wo Sukuitai: Battle Tournament';