They are installed using a tool called FBI (see below). These are files containing software (or games) packages specifically for the 3DS.These are files that can be run using the Homebrew Launcher.Individual games can be installed to the home screen if desired (see New Super Ultimate Injector below).Decent battery life and official replacement batteries are still available for purchase.Uses a standard micro SD card instead of a proprietary memory stick.Second screen is convenient for emulator menus, logs, etc.Decent build quality typical of Nintendo consoles.The New 3DS models are powerful enough to emulate most 16-bit consoles and some limited ability to emulate Nintendo 64 and PlayStation 1.Powerful enough to emulate most 8-bit consoles.Easily hacked to install homebrew/emulators.Many emulators are only capable of running on a New 3DS.This document mostly uses the term “3DS” but is also applicable to the 2DS.

If it's an old one that's been blocked, you can either install a patched TWL_FIRM to your emuNAND or use a CFW that applies the patches automatically (e.g., Luma3DS, or I think Cakes, no clue if RxTools does it). No, there is no DS emulator on the 3DS, just stick with the R4i you have to play DS games. at full speed, while the O3DS struggles it's merely the fact that the O3DS has a LOT more work to do and not enough CPU power with which to do it.

That's why the original DS (and GBA to an extent) can run things like Goomba, GameYob, Genesis DS, etc. The original DS and GBA (and SP) didn't have this problem with pixel pushing, because they still had dedicated 2D hardware that was similar to other tile-based consoles.

Since the N3DS's clock speed is roughly 3x faster, it has more raw power to brute force all those pixels to the screen (and hence why it can also run more accurate emulators than the O3DS). That, paired with a 268MHz CPU doesn't leave a lot of room for the O3DS to both simulate the hardware of an old console and push pixels to the screen to show the game. Modern GPUs don't typically use tile-based graphics anymore (PowerVR in phones is one example of a modern GPU that does), which means that it's up to the CPU to draw each pixel in every tile instead of just giving the GPU tiles to draw (meaning it's very slow). That's sort of the trade-off they chose by using a more modern GPU.

Sega emulator for 3ds