Master Class Choices!

Description

Strange phenomenon have been happening at Cerise's Laboratory lately such as rooms getting ramsacked. On hunting down the problem, Ash & Goh find out that the culprit is none other than the Gengar they had encountered previously. Ash & Goh both intend to catch the Gengar but Ash starts acting very weird and even almost falls down the stairs. Is Gengar responsible? Will they stop Gengar?