You can often toggle between original aspect ratios and 3DS-specific scaling. How to Install SNES CIA Files
The Nintendo 3DS has long been a favorite for enthusiasts looking to build the ultimate handheld gaming machine. While the system natively supports several generations of handheld titles, many fans want to take their library further by adding games directly to their home screen.
Since the official library is limited, the community uses "injectors." These tools take a standard SNES ROM and wrap it inside a CIA container that "tricks" the 3DS into thinking it is an official Virtual Console title. Hardware Requirements: Old 3DS vs. New 3DS
These models have a faster processor and natively support SNES Virtual Console CIA files with near-perfect accuracy.
There are two primary ways SNES games function as CIA files on a 3DS: