The "Highly Compressed" 3DS Archive Verdict: A mixed bag of technical marvels and potential security hazards.
If you find a file claiming to be Pokemon Sun compressed to 200MB, you are likely looking at a re-pack. This involves highly aggressive compression (like 7Zip or WinRAR with ultra-settings) or, more commonly, the removal of game assets.
A massive action RPG that clocks in at around 2.6 GB. 3ds games highly compressed
For users managing files on a computer, legacy tools like feature a built-in "Trim" function. You simply drag and drop a .3DS file into the program.
If a compression tool malfunctions or strips vital data alongside the padding, the game will crash or refuse to boot. The "Highly Compressed" 3DS Archive Verdict: A mixed
Click the execution button. The tool will scan the file, identify the padding, and delete it.
As mentioned, many 3DS games already use internal compression. This means that attempting to re-compress them may result in little to no space savings, and it may sometimes increase the file size slightly. A massive action RPG that clocks in at around 2
If storage is your primary concern, the best review advice I can give is:
Avoid the immediate need to purchase a larger, more expensive MicroSD card for your handheld system. How to Compress 3DS Games Yourself