Source is VGC for ranking.
Overall sales rank includes every game included in VGC database.
Western means Europe + NA, basically means the game is playable in English. Japanese sales are included but japanese only games are not (In the future, I think I will include Japanese only games if it is officialy announced that they are coming west.
If you guys have official worldwide numbers for some of those games, I will include them (I'd like to also have the date when they were released)
Ah, thanks for the clarification.
For official numbers: Nintendo said that Zelda, Arms, 1-2-Switch and Mario Kart each sold more than a million. Although that probably includes digital.
Interesting the overall ranking. Zelda is just one place above Majoras Mask (on the N64). Funny coincidence. With next weeks data it will overtake a lot of games.