I know this is already a thing in Wii Sports, but an All Sports+ category would be great for this game as well. It allows players to find optimization strategies that aren't possible in the regular All Sports category. Furthermore, it's great for those who prefer longer speedruns in general.

The requirements for the run would be as follows:

Win a game of volleyball

Win a game of badminton Complete bowling

Win a best of 5 match in tennis Win chambara using all 3 chambara sword options

Complete a game of 4 on 4 soccer

Complete 9 holes of golf

(Fast exiting would also be allowed)