Four tweens develop a life-long friendship when they discover an injured mystical sea creature. They go to extreme lengths to protect it from selfish scoundrels set on capturing it and harming it for their own profit.

Just one enchanted jewel stands between earth and an army of evil spirits led by the devious ghoul, Phears. With the help of his new girlfriend and ghost pals, Max Doyle races to find the crystal and save the world.

Bella Thorne, Madison Pettis and Ryan Ochoa lead an ensemble cast in this spook-tacular adventure with new ghosts, new thrills, and the return of some old friends. Max (Ochoa) only has eyes for Cammy (Thorne), the smart, popular redhead at school. When Max finally scores a date with Cammy on Halloween, Phears, an evil ghost with plans on taking over the world, unleashes his ghouls and things go haywire. With the help of his ghostly pals, Tara and Nicky, can Max thwart Phears' evil plot, help reunite his ghost friends with their long-lost parents and still make his date with Cammy on Halloween? R.L. Stine's Mostly Ghostly: Have You Met My Ghoulfriend? is a frightful family delight!