Mysterious Merchant
Levels where the Mysterious Merchant appears!! 
- world 1-2: Has a batch of very cheap bombs
- world 1-4: Sells Super Blue-and-White Slippers
- world 2-1: Sells oil from India
- world 2-3: Sells "Buy One Get One Free"
- world 2-4: Sells the King of Flamethrowers
- world 3-3: Sells 5-Up