Super Mario Party really surprised me. The legs are crazy for that game.

Super Mario Party was the only one that really sold more than I expected. After lower sales on 3DS and Wii U, it seems like Mario Party is going back to being a huge franchise like it was last gen.

Im honestly beyond shocked that smash is beating out monster hunter. Monster Hunter had many people predicting doom and gloom. Then the game managed to not only sell well, but also was on track to become the best selling capcom game ever. Monster Hunter finally broke through in the West.

While Smash was guaranteed to be a huge success.

Mario Party for me, 5 million since Oct is insane

LOL at smash bros, the BIGGEST Nintendo game Launch in History!

MHW.... that one is kinda easy.

I think the reason why some are picking Smash is because even though we expected Smash Bros. to sell well, did most expected Smash Bros. Ultimate to successfully literally carry the Switch's holiday season? To help the Switch sell the most units in a month ever (1.77 million in a month) in this generation AND break a record as the best-selling exclusive for a month, over the likes of 2010's Halo: Reach, 2018's Spider-Man, etc.?

To me, I think Pokemon Let's Go should get a shout out. For a game that has been maligned at times by hardcore fans and judged more as a game it was NOT, its selling well for what it is, a transitional game that is a Pokemon Yellow remake with Pokemon Go elements. And it did its job, help sell Switch units in a crucial part of the fiscal year.

Monster Hunter World did really well as a game that bridged the Western audience and the Japanese audience and bring the franchise into the mainstream. With a more streamlined gameplay experience and more emphasis in online multiplayer, the game maintained what made Monster Hunter what it is while bringing in new players that previous games couldn't.

Super Mario Party is also one to consider. After previous installments fell flat in terms of quality, Super Mario Party was a back-to-basics type of game that actually worked out well, despite a small number of boards. Surprisingly, it helped Pokemon Let's Go and Smash Bros. Ultimate carry the Switch through the holidays in 2018.

The reason why I went with Spider-Man is because that level of success for a comic book character based videogame is INSANE! Outselling Madden as a (relatively) late release Rookie(if you will) doesn't come along often. For it to be neck in neck with Smash Bros. Ultimate is Amazing! (sorry, had to do it :P)

LOL at Super Smash Ultimate, there was a thread predicting 15 million sold during 2018

A more correct answer is
Monster Hunter World see this thread for evidence http://gamrconnect.vgchartz.com/thread.php?id=231864

I guess that makes me VGChartz current reigning champion super predictor?

LOL at Smash Ultimate sales? so Smash Ultimate managed to outsell titles like GOW, Spiderman, and MHW in just 4 weeks is just a LOL-worthy but not a huge surprise? 

15m prediction is for the shipment, not the sales. Would you tell us what was your prediction again?