WII U can't play 3ds games, so no that's not correct. It also can't play gamecube games unless you hack it, if I recall correctly, so that excludes the obsure

WII U can't play 3ds games, so no that's not correct. It also can't play gamecube games unless you hack it, if I recall correctly, so that excludes the obsure 4 Swords gamecube came which was never ported. Incidently Steam Deck can't do 3ds games well either, apparently AMD support for the 3ds emulators are very bad.