Possible Clues:

• He warned against the all-syrup Squishee
• "The Simpsons" clerk
• Springfield storekeeper
• Squishee seller on "The Simpsons"
• ''The Simpsons'' clerk
• Springfield Indian
• "The Simpsons" storekeeper
• Kwik-E-Mart storekeeper
• Homer Simpson's Indian friend
• ''Simpsons'' merchant