With the helmet on him , Goofy starts deviating from his and Mickey 's original invention .
Goofy and Mickey compete with the Hot Dog Hills Invention Competition with the help of Professor Ludwig Von Drake where his helmet has made Goofy smart .
With the helmet on Mickey , Goofy starts deviating from Mickey 's Mickey Mickey 's original invention .
Goofy and Mickey compete with the Hot Dog Hills Invention Competition with the help of Professor Ludwig Von Drake where his helmet has made Goofy smart .