If you decide to try local emulation using legacy APKs, your device will need every ounce of performance it can muster. Use these steps to optimize KitKat:
If you are determined to try, these are the only "legacy" paths that might exist, though performance will likely be unplayable: 3ds emulator for android 4.4.2
Since native 3DS emulation isn't viable on KitKat, your best bet for a similar experience is to look at Nintendo DS If you decide to try local emulation using