The Switch has the Repentance DLC. It has all the content. It runs at a smooth 60 FPS. It supports co-op. The only downside is the lack of 3D, but the screen is bigger and brighter. Buy this instead.
On March 27, 2023, Nintendo shut down the 3DS eShop forever. You cannot legally buy this game digitally anymore. Physical cartridges exist, but they are rare. In Europe, physical copies were published; in North America, the physical run was extremely limited. The result: The only way for a latecomer to play the official 3DS port now is to either buy a used cartridge for $100+ on eBay or sail the high seas. The Binding Of Isaac 3ds Rom
When users search for “The Binding of Isaac 3DS ROM,” they typically fall into three categories: The Switch has the Repentance DLC