Trolls Rocking Harmony

(Part one of the Rocking Harmony AU)
John Dory found himself on Vacay Island after he spotted some Techno Trolls setting up for a rave and couldn't pass up the opportunity. After a very close encounter with the Rock Trolls and learning that they are after the six musical strings and the members of BroZone to use the Perfect Family Harmony to unify the six tribes under rock, he and Bruce race to gather the rest of their brothers and hopefully protect the strings along the way.