Clear the game and save the completed file. When you load the game, you will now be able to play as the guest characters that joined you during the game such as Kee Keema, Meena, Wataru, Mitsuru, and Kutz.

Clear the game and save the completed file. When you load the game, you will now be able to view more details on all the game's enemies by view the Monster Album in the Other menu. Highlight any monster and press X to view their details, including how to craze them.

After defeating the three sets of twins at the Bandit's Hideout, Leynart will capture the thieves and reward your party with a feast. He will then bid you farewell and give you a bag of "gems" that they had in possession. Yuno will take the bag and ask which of the four stones you would like: Red, Blue, Purple, or Green. Whichever stone you choose will be socketed into your Traveler's Sword, so choose wisely. The Red Stone gives resistance to fire-based attacks and grants you fire power within the sword. The Blue Stone does the same with ice/water, the Purple Stone with lightning, and the Green Stone with Wind. Your sword skills will depend upon your choice.
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When in the item shop in most towns, you are able to purchase Sleeping Bags and Camping Sets. They each cost 100 Tems. However, the Sleeping Bag is party partial recovery and the Camping Set is party full recovery (HP/K.O.).