Laynie

Voldemort attempts a spell, which backfires and robs him of his powers, forcing him to live a Muggle lifestyle, aided by his faithful servants, Bellatrix and Wormtail.

Harry and his friends go to a new theme park for wizards, Wizardland, where a spell makes some stupid - like Draco who drags poor Lucius around until he spazzes out on roller coaster and winds up talking to an argyle leprechaun that smokes.