3DS games partnered with Switch games in their series makes for a pretty good display. (I would've put Super Mystery Dungeon there, but I don't have the box...also manifesting Fantasy Life sequel...) :
HOW TO PLA-Y 3DS G@-M3S ON TO YOUR NINTENDO SWITCH! - YouTube
How would Nintendo handle DS and 3DS games on Switch? : r/nintendo
5 3DS Games Switch 2 Needs as Ports to Hit the Ground Running | The Nerd Stash
3DS Games Are Now Running On Nintendo Switch – NintendoSoup
20 Best 3DS Games For Nintendo Switch Online! - YouTube
You Can Now Buy Nintendo Switch, 3DS Games At The Humble, 57% OFF
Tons of sales data revealed for first and third-party Switch / 3DS games
Nintendo is bringing more 3DS games to the Switch
What Nintendo Consoles Are Compatible with 3DS Games?
Don't Miss These Nintendo Switch, 3DS Digital Game Deals | PCMag
Switch vs. 3DS: Which Nintendo Console Is For You? | Tom's Guide
If Nintendo Brings DS Games to Nintendo Switch Online, 3DS Games Shouldn't Be Far Behind
How To Play 3ds Games On Modded Nintendo Switch (Retroarch Citra Guide) - YouTube
Nintendo Switch sales surge past those of the 3DS - BBC News
Nintendo could bring a Fire Emblem remake and other 3DS games to the Switch
Nintendo 3DS - Wikipedia
Nintendo Switch 3DS DS Pokemon Video Games Series 26 Type Japanese Ver. w/Case | eBay
Can Nintendo Switch Games Be Played on 3DS? – CareerGamers
eShop Update New Games on Nintendo Switch , 3DS and Wii U - myPotatoGames
Can You Play 3DS Games on Nintendo Switch? - InPics Solutions
Nintendo eShop | Nintendo
