Ash and friends chance upon the Trick House Contest, in which contestants must compete to pass through a house rigged with obstacles and traps, and the winner gets a year's supply of Pokéblocks! As if this weren't enough of a challenge, Team Rocket infiltrates the contest and lies in wait for the right opportunity to nab Pikachu! Alanna and her Whismur are also competing, as is a wild Jigglypuff who's been following our heroes around. As our heroes attempt to negotiate the maze, Jigglypuff keeps bursting into song and sending everyone to sleep (except for Whismur, whose Soundproof Ability makes it immune), and Team Rocket keeps sabotaging the obstacles. Eventually, the villains come out of hiding to grab Pikachu and Whismur, but with some sound strategy from Alanna, Whismur sends them blasting off again! Ivan of Mauville City ends up winning the contest, and our heroes are headed there next!