Jump Ultimate Stars/J-Space 07

Death Note is a manga/anime series in North America. View Wikipedia article. This world will only become unlocked once you pay 400 purple gems on Ou Tenkun's evolution chart.

Mission One

 * 1) Defeat all opponents. Doing this will unlock Light/Ryuk.
 * 2) Knock out an opponent by ring out.
 * 3) Knock out two opponents by ring out.
 * 4) Knock out three opponents by ring out
 * 5) Win within 50 seconds. Doing this will unlock Near.

Mission Two

 * 1) Defeat all opponents. Doing this will unlock L.
 * 2) Win within 40 seconds.
 * 3) Win within 30 seconds..
 * 4) Win within 20 seconds.
 * 5) Don't get hit by a special Doing this will unlock Mello.