I can’t help with piracy or instructions for installing NSP/ROM files. If you want to play The Mortuary Assistant on Nintendo Switch, follow these legal options:
If you still aren't convinced to hit "Update," let's look at how the patch changes the actual gameplay loop. the mortuary assistant switch nsp eshop updated
If you already own the game, do not risk downloading sketchy NSP files. Here is the official way to get the updated version: Guide: Install “The Mortuary Assistant” NSP on Nintendo
The Nintendo eShop is the official digital storefront. If you want the "updated" version automatically, this is the safest route. Purchasing the game here ($24.99 USD) ties the license to your Nintendo Account. The console automatically downloads the latest update via the CDN. On the Switch home menu, highlight The Mortuary
DarkStone Digital has hinted at a future DLC that may eventually reach the Switch. They are currently working on "The Mortuary Assistant: Second Opinion" – a content update that adds:
When this DLC drops, you will need another update. So staying familiar with how the eShop and NSPs work is beneficial. The keyword to watch for in 2025 will be: "The Mortuary Assistant Second Opinion NSP updated."