Where can I buy outfits in Ni no Kuni 2?

Ni no Kuni 2 guide has a list of all costumes and how to get them. Near Blowtorch Cave, there is a treasure chest. There are Robes of unity. The costume is a replica of Oliver's Outfit. The spoils of victory. There is a car called the regal attire. The King's Robes are from the hydropolitan area. The Junior Consul's Clothes. The coat is shabby.