After joining the Wolfmen rock trio for the biggest concert of the year, Monster gets an extreme case of stage fright. Knowing that the show must go on, Max, Chuckie, and Jill help Monster to take the stage, unaware that Beastur is waiting to bring the curtain down on him.
Monster takes a crash course in baby-sitting when he helps Max and Chuckie take care of Mr. Hinkle's rambunctious little niece.;After baking up a batch of "dynamite" Monster Cookies for Jill's Charity Bake Sale, Max, Chuckie, and Jill are shocked to learn that Monster cookies explode! This leaves Max, Chuckie, and Jill with no choice but to cancel the cookie order, before the cookies cancel their customers!
When Chuckie accidentally bets Monster in a pie eating contest, Max stands to lose his pet and best buddy to Leo the school bully. Only by becoming the Masked Muncher can Monster hope to win the contest and eat more pies than Jumbo Jim, Leo's king sized contest shoe-in!
Monster misinterprets something Max says and feeling he's not wanted anymore, runs away from home! Max, Chuckie and Jill try to find their Monster buddy before Beastur captures him and takes him back to Monsterland for good!
After stealing priceless gems from the local museum, two bumbling thieves get more than they bargained for when Monster dishes out his own fun-filled style of "monster justice".;When Monster takes his writing lessons to heart, and spares Max's Mother the trouble of signing and mailing Max's poorly marked essay, Monster and Max scramble to stop delivery of the letter before it reaches Max's teacher!
Monster is the star of Max and Chuckie's new video movie but the fun soon takes an unexpected turn when their videotape gets mixed up with Mr. Hinkel's, leaving Monster and His buddies with no other choice but to retrieve the tape before Monster is seen on the news channel!;Monster decides to follow in the footsteps of his favorite comic book hero and becomes, GARBAGEMAN!, masked superhero and champion of justice, as he battles two thieves named Lou and Bert.
A trip to the zoo finds Monster falling in love with a rare blue gorilla! Mistaken for the blue gorilla, Monster is "ape" napped and his mosteriffic sense of fun proves to be more than his captors can handle!