Unlock Demon Shaft Dungeon
Complete the game and save to unlock the Demon Shaft. The Demon Shaft will be selectable under the 'Go To Other Areas' map.
100% success rate. 

Faster Movement
If you want to get to a place in walking mode faster, enter edit mode. Move the pointer to your destination and exit edit mode.
100% success rate. 

Ultimate Weapons
Use the Build-Up command instead of Status Break to get the best weapons in the game. Status Breaking will only take away 40% of your weapon's power. Use the Status Break only when getting special abilities for your main weapon.
100% success rate. 

Kill the First Boss
To kill the very first boss you have to hit it while it's flying in the air with Xiao's catapult and when it's landed use the sword. Depending on how strong your sword is the amount of times it needs to be hit varies. So I suggest leveling up first.
Submitted by lionhart87. 100% success rate. 

Easy Money
Enter the divine beast cave then get a lot of prickly fishing bait. This can be sold for lots of money.

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