Money back from Mr. Hat
After paying off the characters inside the Armor Outpost's hat shop, it is possible to chase Mr. Hat around the outpost to get your money back. Just after winning the battle inside the shop, go outside to find Mr. Hat standing on top of the shop's sign. Use the airship to get on the rooftops and jump over to him. He will give you 1,000 gold and run away. Return to the airship to find him again for another 1,000 gold before he jumps down a hole. After the two-way catapult on top of the airship is available, go there to find him one last time and receive 1,000 gold before he catapults away.