Apperently in the code of the emulator they created for Mario Sunshine and Galaxy there are specific functions those 2 game don’t use, one of them is used by Star Wars Rogue Leader, and I would absolutely love an HD version of that game, it would look amazing. Rebel Strike too.
Else, pretty much every Zelda, Kirby, Mario and Metroid game that isn’t on Switch yet, also Luigi’s Mansion 1&2, the Fatal Frame series, Onimusha 2-4, all Ys games, No More Heroes 1&2, all Trauma Center games including Trauma Team, all Goemon games, all Senran Kagura games and Rare Replay.