Treasure Islands carry a specific subset of items: Items you CANNOT buy with bells. Any items you cannot buy with bells can be more difficult to find, and the purpose of the Treasure Island is to make it easier for you to get those items! These items include:
• DIYs
• Cooking Recipes
• Seasonal DIY Items (Cherry Blossom set, Mush set, etc)
• Event Exclusive Items (Bunny Day, Halloween, etc)
• Items you can only buy with Nook Miles at the Nook Stop in resident services.
• Crafting Materials
• Bells, Nook Mile Tickets, and Royal Crowns (these are good to sell to make millions of bells easily)