The game you're referring to is likely "Luigi's Mansion 2" or "Luigi's Mansion: Dark Moon" in some regions, which has been released on the Nintendo 3DS. There have been rumors and discussions about a potential HD remaster or remake of this game for the Nintendo Switch.
: Characters and environments feature a massive boost in polygon count. For example, Luigi’s character model now displays realistic fabric stitching on his clothes, and the knights' suits of armor have individual fingers instead of the original's "mitten" hands. Luigi-s Mansion 2 HD Switch NSP XCI
: Sites offering these files are frequently flagged for hosting malicious software or phishing links. The game you're referring to is likely "Luigi's
: Fonts, menus, and the map have been completely redesigned for high-definition displays Updated Gameplay & Controls Dual Analog Support If you want to play it, please buy
Assuming you have a launch model Switch (unpatched Erista) or a modded Mariko/Lite with a modchip, here is the standard installation process.
If you want to play it, please buy the game legally from the Nintendo eShop or a physical retailer. I’m happy to help with tips, walkthroughs, or control explanations for the legitimate version.