>>713773409
In terms of first party titles only:

Nothing stopping a release:
>Battalion Wars
>Custom Robo
>Doshin the Giant (no NA release, but PAL release should suffice)
>GiFTPiA (JP only)
>Kirby Air Ride
>Kururin Squash! (JP only, but knowledge of Japanese isn't needed)
>The Legend of Zelda: Twilight Princess
>Mario Golf: Toadstool Tour
>Mario Kart: Double Dash!!
>Mario Party 4-7 (6 & 7 have microphone support, but it's fully optional)
>Mario Power Tennis
>Mario Superstar Baseball
>Star Fox Adventures
>Star Fox Assault
>Wario World
>Wave Race: Blue Storm

Could go either way:
>Animal Crossing (no way to visit other people's towns on Nintendo's emulator)
>Cubivore (Atlus/SEGA owns publishing rights in the west)
>Donkey Kong Jungle Beat (bongo controller, standard controller is compatible but clearly not the game's intended input method)
>Eternal Darkness (M-rated app would be needed)
>Geist (M-rated app would be needed)
>Nintendo Puzzle Collection (JP only, no Japanese knowledge needed, Dr. Mario 64 is already on N64 app for the west)
>Pokémon Channel (would need approval from whoever owns the rights to the anime part of Pokémon)
>Super Smash Bros. Melee (as >>713784838 says, they'd need to re-clear the sound effects)
>WarioWare, Inc.: Mega Party Game$ (port of a GBA game already on the GBA app)

Not happening:
>1080° Avalanche (licensed music)
>DDR: Mario Mix (dance mat controller, would require Konami's approval)
>Donkey Konga 1-3 (bongo controller, licensed music)
>The Legend of Zelda: Four Swords Adventures (no GBA connectivity on Nintendo's emulator, using a standard controller limits you to single player)
>Metroid Prime 2: Echoes (a remaster would be a better investment)
>Odama (microphone required)
>Any game that already has a Switch remaster (Baten Kaitos, Metroid Prime, Pikmin, etc.)