This portion of the Luigi’s Mansion 3 guide covers the Fitness Center walkthrough including all the fitness center gems and how to beat the swimmer boss who keeps tossing volleyballs at you. Here, you’ll also find answers to the yoga mat puzzle, the shower puzzle, the exercise machines puzzle, and more.
In general, the Fitness Center is brimming with secrets so be sure to shine your Dark Light on everything and ignore the broken drinking fountains. They won’t yield anything no matter how many times you flash your light.
Below are the walkthrough sections and objectives. Please note we may have added a few objectives ourselves to indicate the steps you need to take to complete the main objective. Objectives that don’t directly appear on your menu are italicized.
Source: IGN.com Luigi's Mansion 3 Guide: Fitness Center Walkthrough