Well, you did ask me to write a nonsensical fairy tale, so singing in dance competitions is allowed. 

I will revise the part where King Fungus meets Sir Hopsalot as follows: 

One day, while King Fungus was out searching for delicious cheese to savor, he stumbled upon a small frog who was wearing a top hat and carrying a cane. The frog introduced himself as **Sir Hopsalot**, and he claimed to be the greatest dancer in all the land.
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