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Fun 3DS Games/Projects
(hexbear.net)
Tabletop, DnD, board games, and minecraft. Also Animal Crossing.
3rd International Volunteer Brigade (Hexbear gaming discord)
Rules
Fossil Fighters, two games on the DS and one on 3DS
Kirby Mass Attack
Captain Toad Treasure Tracker is fun actually
Mario & Luigi series, especially Bowser's Inside Story
There's also a GBA emulator for the 3DS if you want to broaden the range of games.