Completion bonus:
Successfully complete the game and save the game. Load the cleared game file. When the game is resumed, you can play as NPCs such as Kee Keema, Meena, Wataru, Mitsuru, and Kutz. Additionally, enter the "Other" menu and select "Monster Album". You can view details on any enemy by pressing X while they are highlighted.

Better recovery item:
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.).