The 9th room of the core series. Synopsis The gang enter the world of Transformers! Notable Events This room is dedicated to Onslaught, as he loves Transformers. Thunder Mayhem and Sentinel Prime were defeated. Retrieved from "https://in-a-locked-room.fandom.com/wiki/The_Room_of_Transformers?oldid=173906" Categories: Original series episodes Episodes Season 1a episodes Season 1 Community content is available under CC-BY-SA unless otherwise noted.