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.
There’s some more games that benefit from the extra power, like Smash Bros.
And if you’re interested in emulating older systems on it, you’ll need the extra power.
If you use CFW you can toggle it on in games that don’t natively use it too. I have it toggled down specifically for Omega Ruby purely because otherwise it stutters when an attack goes