I'd choose Twilight Princess but since that was a Game Cube fame I'll choose Wii Sports cause of the Golf. Never was there such a fun golf game (Everybodys gold VR is better but very limited and solitary). Many hundreds of hours played with friends on local co-op on the golf alone but the other games make Wii Sports just amazing, it was like California games on the NES and everyone wanted to play it if asked, just pure fun and friendly competition.
Hopefully if VR ever gets its wii moment and a device that makes it become as easy as putting on sun glasses and donning some gloves at prices as low as the Wii or Switch, we will see games like that again. Meta Quest has a chance but they are updating devices to soon for any real breakthrough where one device becomes the staple for casuals at home. It would take a new device, by perhaps Nintendo, to make that a reality cause VR is so damn impressive and really has the capability to compete with TV's, laptops and phones for the share of eyeballs.