Dennis's worst nightmare comes true when Walter finds a hand-written journal called The Book of The Menace, literally containing every trick in the book.
Dennis and co concoct a super plant food to speed up their homework of growing cress - but end up with an overgrown lawn, and some errant water-cress hybrids with an insatiable appetite.
When a new patisserie threatens to close down Pieface's Dad's pie shop, he issues a challenge: whoever can cook the tastiest pie wins; and the loser has to shut up shop.
Dennis pranks an exhibition opening and accidentally breaks open an ancient Egyptian sarcophagus, paving the way for an epic double bluff as Walter convinces the town they are the victims of an evil curse.
Walter and co challenge Dennis and co to a card strategy game called Omega Flip - and the losing gang have to be butlers to the winners for a whole month.
Mayor Scrimp bans skateboarding on the eve of the mayoral election, prompting the menaces to sabotage his campaign - but then Walter's Dad is elected in his place.
Dennis's elaborate excuses catch the attention of actor Blake Midwinter - and he ends up as the lead in the school play - unfortunately, it's a romantic lead.
The menaces are horrified to learn that the end of term trip to the adventure playground has been replaced with a School Prom - and worse still, Dennis is roped in to helping organize it as a punishment.