Adventure Time: Fionna and Cake Episode 9 Casper & Nova Episode Title: Casper & Nova Episode Description: As Fionna and Cake return, their universe has yet to become magical; when Simon tries to put back the crown, GOLB petrifies him and transfers his mind to Shermy, who lives in the future Land of Ooo. As Shermy, Simon tries to find clues from a book about the crown and ancient artifacts, which is a holographic game featuring the titular characters; Scarab is also turned into bugs, but he enters Fionna's world through the still open portal on Simon's head. At first Fionna contains the bugs but Ellis P. unleashes them, allowing Scarab to reassemble.