Hello everybody I figured out similar to the wii scene that you can easily scrub/clean a 3ds rom simply with a hex editor.
Here we have the steps.
1: Download HxD Hex editor http://mh-nexus.de/en/hxd/
2: open the rom in the hex editor
3:Scroll to the bottom and highlight all of the FF Hex's up to the encrypted data
4: press delete
5: save as -> Name the rom something
6: your rom is now shrunk
Here we have the steps.
1: Download HxD Hex editor http://mh-nexus.de/en/hxd/
2: open the rom in the hex editor
3:Scroll to the bottom and highlight all of the FF Hex's up to the encrypted data
4: press delete
5: save as -> Name the rom something
6: your rom is now shrunk