The TimerInstructions for Use
Get information from page at the top.
Input Map Seed + Amount of Chests on each floor +
Monster Rank (Gamefaqs page)Go up to the chest you want the loot from (Preferably with the "!" showing) and quicksave.
Click the Start button on the timer and the Begin Game button at the EXACT same time
Quickly press B to remove the grotto title and then go in battle records
When the item you want is at the top of the table on the chest timer, get out of battle records, and claim your loot.