Ranked from worst to best:
I...really don't like this one all that much, lol. It kinda sounds like they just took the original, added an instrument or two, and then let someone play with the speed features on Audacity. 4/10
It's kinda sad that the only Pikmin motiff that exists to Smash composers is "DAAAA NA NA NAAAAA NAAAAAAAAAA". While this remix isn't bad, it has too much padding in the middle that sounds like it's about to lead into something, but never does. It just loops back to the main theme. 5/10
I like this one. It has a nice, although admittedly repetitive melody. 6/10
It's bright, happy, and fun, but kinda suffers from the same repetitive problems Galaga Medley does. I'd listen to it in Smash and enjoy it, but I don't know how often I'd choose to listen to it outside of playing the game. 6/10
This one caught me off guard! I really like that they went with something so different for an Animal Crossing song. It fits a frantic, high energy game like Smash but is also pretty reminiscent of the relaxing pace of the game it comes from. 7/10
They managed to take a soundtrack that is SUPER hit and miss and make a remix that is definitely a hit. I'm very excited for both this song, and whatever songs from Wooly World make it in. It's just so dang bouncy and happy, I love it. 7/10
This one right here is FIRE. I can't not think Sonic Adventure 2 when I hear it (Probably because of the composer!), and that makes me love it even more. 8/10
Hey, you got your Kingdom Hearts in my Street Fighter! And I LOVE it! I'm a sucker for any of Yoko Shimomura's music, so this is an easy win with me. 8/10
It's Kirby music. It was already god tier, all this does is simply reinforce that. 9/10
Legit got chills when I listened to it for the first time in June. The amount of Metroid love Ultimate is giving is almost enough to make this Metroid fanboy cry, lol. 9/10
Mario 3 is my jam, and the soundtrack from it is some of the best Mario has to offer. The fact it also sounds very Sonic-esque doesn't hurt, either. 9/10
Everything about this is amazing. I can't really put it into words, it's so, so dang good.
F-ZEROOOOOOOOOOO/10
I have nothing to say other than Callie is best girl. Callie/10.
Music can make me pretty emotional when it touches me, and hoooooo boy does this one get me choked up. It brings up all the magical memories I have of playing BotW, and the wonder that game gave me the entire way through. Easily 10/10
I love Tomodachi Life and Miitopia so much, and the music is a big reason why. I mean, the 3DS version was already perfect, but this remix somehow manages to blow it away. 10/10
Easily the best track in the game for me personally. The beat, the fast rhythm, the goofy rap segments, and the fact it came from (in my opinion) the best character reveal trailer Smash has had yet makes this truly a masterpiece in my eyes. K. Rool being revealed was such a big moment for Smash fans, and this remix is very fitting and worthy of that. 10/10