The Imaginary Sleepover Spinoffs 2:The last Mulberry

When Mekhi kills all the mulberry trees and bushes, an expedition to Mulberry Island must be done. Tyler, the rest of the room 1128 students, Patrick, as well as some of the sleepover people go on the ship to sail to Mulberry Island. Will they get there before Mekhi can get there to stop them? And will they deal with the witch of Mulberry Island?