In Luigi's Mansion 3, how to get out of the basement in Luigi's Mansion 3 can be referenced as follows:
1. Open the game and find the parts as shown in the picture below.
2. Click [X key] to open the door, as shown in the picture.
3. Go right after going out, as shown in the picture below.
4. Come to the elevator entrance and take the elevator out of the basement, as shown in the picture.