I was actually just looking into this because I don't know that much about boot 3 (since I have a New3DS and I don't have reason for NTR on my old3DS.) So I was looking into this and found SuMoCheatMenu just requires boot 3 to be installed to work on an old3DS. So I wasn't sure about the others and couldn't find a solid answer.
ultraSuMoFramework might not work with Boot 3, it most likely takes up too many resources. You may need to use the Luma plugin method
https://gbatemp.net/threads/release...in-for-ultra-sumo.489098/page-35#post-7750479
The old3DS has extremely limited resources and the Luma3DS uses far less resources than even Boot 3.