"Based on what I've seen, I think any high-quality nintendo themed item would be well-received by the population. The Ash Ketchum hat, the Captain Falcon Helmet, and the Master Sword would all be a hit. There's a thread I made on gamefaqs where those three items were requested almost nonstop, and I got over 200 responses, so I did get a grasp of what people wanted. Next, how 'bout making a Waluigi cap? That's another thing everyone wanted."

-My Two Cents