Based on this site, it looks like there are just 15 games.
| Game | Availability | Notes |
|---|---|---|
| The Binding of Isaac: Rebirth | eShop only | |
| BlockForm | ||
| BRICK RACE | ||
| Dragon Fang Z: Ryuusha Rose to Yadorigi no Meikyuu | eShop only | A 2019 New 3DS port of the 2017 Switch game. |
| Fire Emblem Warriors | ||
| Futuridum EP Deluxe | ||
| Lifespeed | eShop only | |
| Minecraft: New Nintendo 3DS Edition | Both | |
| Pinball Hall of Fame: Williams Collection | ||
| Pirate Pop Plus | ||
| Pixel Hunter | ||
| Runbow Pocket | ||
| Silver Falls: 3 Down Stars | eShop only | |
| Wind-Up Knight 2 | ||
| Xenoblade Chronicles 3D | Both |
I only ask, because that console is selling used where I live for about 200-300, but the 3dsxl is only about 100 if you find a good deal usually around 120.
If you are interested in custom firmware, there are homebrew apps that either are better with the n3ds or outright require it. I don’t know which Moonlight is but you can stream your PC right to the 3DS which I find wholly awesome. I made the upgrade from regular to “New” back in the day and haven’t regretted it a minute but if you’re on a budget or just playing it the way it was meant to be played you may be better off with the OG