GameBoyFan.com Walk Through
Your search will end on the second floor of the hotel. The thieves know that Ivan is with you and will run around the room. They're too slick for Isaac so head toward the exit to regroup with you party. Ivan has an idea of everyone works together to trap one of them so he can use Mind Read. After trapping them, Ivan will confirm that they are the thieve they're looking for and also the stolen goods are hidden somewhere in this inn.
Remember that hole left in the roof of the inn? You can reach it by climbing the ladder along the wall. Inside you will see a gap in the floor and a crate on the otherside. Use Move to move the crate to the leftside to the room to free the door on the right. Hop the gap and enter. Inside are the goods and someone tied up. Cut the ropes and the person turns out to be a roof repairman. The thieves will enter and a conversation will start about the town of Lunpa. The
thieves will try to downplay what they have done by comparing themselves to Dodonpa. They want to be free and that won't happen, but a battle will! Use your Psynergy, Djinn and items. Don't use healing items unless you're out of Psynergy, use Cure instead of Herbs. This battle won't be as easy as the ones faught so far. The two thieves on the side are weaker then the one in middle, take them out first to stop healing the middle one.