The mysterious box found under the sofa in the Fat Goose Gym is under or behind the sofa in the lounge. After opening the mysterious gift box, you can get the corresponding experience reward.

Open the mysterious box of Fat Goose Gym. Put your mobile phone in, open the software, choose a fitness plan and enter your own fitness data. Just start working out as planned.

Fat Goose Gym is a mobile phone game. In "Fat Goose Gym", the player will play the role of the gym manager, get materials through synthetic gameplay, and unlock new areas, new decorations and new fat geese in the gym. All gym decorations can be DIY in appearance and orientation, creating an exclusive gym to attract all kinds of cute fat geese to come to fitness.