Kingdom Keepers. Shell Game 5— Ridley Pearson

As the Five Kingdom Keepers enter high school, everything is about to change. The Maintenance Base that controls all four parks in Disney World is under attack by the Overtakers, a group determined to change Disney forever. Relationships between the Keepers are no longer as simple as they once were.
In fact, nothing is as simple as it once was.
The Disney Dream leaves Port Canaveral on an historic cruise to Los Angeles with a special treat in store for guests: the Disney. Host Interactive teenage guides are on board.
But all is not right belowdecks. Strange things are happening.
Unexplained phenomena. Only the Kingdom Keepers know the truth behind their invitation to be in attendance: nearly every Disney villain is aboard the ship, including Maleficent.
The Overtakers have infiltrated the cast and crew. They have expanded in ways never foreseen, and it's clear they intend to use this element of surprise to accomplish what has eluded them so far: victory.
But not if Finn Whitman and his friends have anything to say
about it.