Cooking Guide - Can't Decide What To Eat? - Platform: Nintendo DS

"Chef" Game and Watch:
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Use the Timer function on any of the recipes that require you to track 
time. After the timer has counted down and the recipe is complete you will 
unlock the Game and Watch Classic Minigame "CHEF" It includes both Game A 
and Game B.

Hidden Recipe:
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To unlock the Hidden Recipe cook something from each country in Asia and 
Oceania.

History and Staff Option:
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Cooking 20 Recipes unlocks the "History and Staff Option" on the setting 
menu. Selecting it scrolls the credits on the lower screen while the top 
screen shows you what you have cooked on what dates with a picture of the 
food and where on the map that food is from.