Contrary to a lot of the non-JPN art, Peter Pepper (Data East's BurgerTime) wears a hat with the first letter of the game's main course. In BurgerTime ("Hamburger" in Japan) it's an H, in Ice Cream Factory it's an I.
https://t.co/l2E8p6viTA

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It's a good time to remember that DECO/Data East's "Peter Pepper's Ice Cream Factory" shows that the letter on his hat is for whatever meal he's dealing with in the game. I for Ice Cream, H for Hamburger (the JPN name for BurgerTime).

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