Rotten School #2: The Great Smelling Bee by RL Stine
Sherman is so spoiled and rich that he threw away his allowance because some of the hundred-dollar bills were wrinkled!
He and his goody-goody friends at Nyce House are always trying to get Bernie Bridges and his Rotten House buddies into trouble.
Well Bernie's in big trouble now. Bernie has a dog in his room, Sherman knows it—and there are no pets allowed at Rotten School!
Bernie has to find a way to hide Gassy, his dog. But the dog stinks. Hey, why do you think they call him Gassy?