The first is that although it was originally developed for the Wii U, a system that we currently own, the game became the flagship of Nintendo's new "Switch" game system. Thankfully, reviews indicated that two games had identical game play and only moderate differences in video and sound (really? sound?). However, that meant that Nintendo was trying hard to sell the Switch version of the game and played back on the Wii U version (even removing some helpful features--like anything to do with a second screen--from the Wii U version that could not be duplicated on the Switch).
Thus, when I went to the store after school on Friday, I found that the Wii U version of the game was sold out (the store only received a handful of copies to begin with) while the Switch version still had over thirty copies on the shelves (although they didn't have that many Switch systems; who's going to buy a game that they don't have a system to play it on?). Walmart didn't get any Wii U versions shipped to them in the first place. Even Amazon did not have the Wii U version for sale; the vendors that did have them were not available through Prime.
I decided to buy the electronic copy directly from Nintendo. The only issue there is that the Wii U has a very small hard drive and I would have needed to delete most of the other game files to make room for a game the size of this one. Luckily, I still had a working external drive that has been gathering dust for a while now. Thus, after hours of downloading, updating, and installing, I was finally able to play the game sometime after midnight.
I haven't played that much as I volunteered to work at a ski meet, had schoolwork, and choir practice today, but so far, the game has been worth the hassle.