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Ben, Gwen and Grandpa Max head to a beautiful seaside resort for some much-needed relaxation -- but they'll need to use all their abilities to defeat the terrifying monster ruining everyone's good time!
Luckily, Ben Tennyson isn't your average 10-year-old... he's also the wielder of the Omnitrix, an alien device that allows Ben to shift into 10 different alien forms from around the galaxy. Together with his cousin Gwen and his Grandpa Max, they're going to defeat the Sharktopus and discover just who would want to ruin a good summer's day!