The World Ends With You

The lucky mallet might be on of the most confusing. I don't totaly remember this game, but I do remember a lot. On the Beet week. there is a time when Pinky is the game master for a day. Beet says your supposed to do Reaper Creaper, but when the you need to creep the second time, don't do it. He will then find out his calling and will re-open Shadow Ramen and you can only go to it on the 6th day. When you go back to the 6th day You just enter shadow ramen and maybe buy something. When you leave Neku will find the lucky mallet.
Personaly if you try to be friends with every stoor owner ( oh ya I did that! ) Mick is the funniest because all thegirls think you hit on them, and he also thinks that so try and become friends with him aswell, it's kinda funny.

In the Beat week (3) on day 3, Pinky is the game master for one day. Your mission is to play the reaper sport 4. Beat thinks it's reaper creeper. When you reach Makoto (Mick) and "Shrimp" (He is called so in another day) talking, you can choose if you'll want to do reaper creeper. Choose "Yes" and you'll have to do it (move it to black and you'll get the black book bag), choose "I can't decide this for him" clear the chapter and jump to chapter 6 week 3. Then enter Shadow ramen and the shop will open. When you exit, you'll get Lucky mallet!

Just go into Shawdow ramen and leave to get it.