Super Mario Galaxy (by a landslide, likely one of my favourite games from the Wii era of consoles)
Sonic 1, 2, 3 & Knuckles (And a bunch of ROM hacks for those games as well, used to play the living hell out of them on SSega back in around 2012-2018 lol)
Kirby's Return To Dreamland (or "Adventure Wii" as its called in the uk for some reason lol)
Mario Kart Wii (damn i wish i knew how to homebrew a wii/dolphin emulator so i can play custom tracks, wanted to play them for more than 10 years lul)
Cuphead (god i remember obsessing over this game around the time it came out although i only started playing it in late 2018 lol)
probably many other ones as well which i just forgot about for some reason