25. The best manga oneshot
Honestly I haven't read many oneshot manga... I really couldn't think of one... although I am sure I have read one :S So I'll have to be lame and say the Naruto pilot ^_^
It is a one shot so I won't spoil too much but... basically Naruto has no friends and is the village prankster. So the Hokage sends him on a mission to make a friend, however the friend he makes is... MURDERED and Naruto IS THE PRIMARY SUSPECT!!!
So go check it out, it's amusing for a half-hour ;)