Fawful Theater is an area in Mario & Luigi: Bowser's Inside Story and its remake. During the events of the game, Fawful turns Bowser's Castle, but more specially his training area, into his own theater, hosting his own show. When Bowser arrives, the doors are just about to open, with some brainwashed Bowser minions waiting. After a few minutes, the doors open, and everyone enters. Inside the room, there are five rows of seats on each side of the room, with a long red carpet running in between. In front of these is a stage that bears many glowing lights and a purple stripe with a Fawful face on it. As Bowser is trying to find a seat to relax in, he discovers there are no more open seats. When he complains to the ushers about this, a brainwashed Goomba comes over to say that Bowser has a special VIP chair waiting for him. After he sits down, the show is immediately started, with Fawful as the host, saying a special cage match will take place between Bowser and Midbus. Just as he calls his name, Bowser is flung onto the stage, forced to battle Midbus in a cage fight. After winning, Midbus is dragged off the stage, with Bowser being taken by some brainwashed Boos and Fawful to the winner's feast.
In the Bowser Jr.'s Journey mode from Mario & Luigi: Bowser's Inside Story + Bowser Jr.'s Journey, the Fawful Theater is briefly mentioned (although never directly seen). When Bowser Jr., Morton (by that point the only Koopaling to remain with him), and Kamek discover that Bowser's Castle had vanished (due to it lifting off earlier to squish Bowser), various brainwashed Goombas state their programmed phrase of welcoming the three "guests" to the Fawful Theater to "take a seat" while also mentioning that there are some temporary technical delays due to the theater being absent.
- Before the show, a Shroob can be found in a seat on the bottom right. When the player tries to speak to it, it only says "...".
- Bowser cannot perform any actions in the theater or the entrance when the player controls him, but he breathes fire at the Goombas in a cutscene. Mario and Luigi, however, can perform all their actions in this area.
- In the admission area before the theater itself, the various Fawful merchandise references his appearances in Mario & Luigi: Superstar Saga. Several posters show him in his outfit from that game, while golden figurines in varying sizes depict him in his antenna-topped form.