Correctly identify which characters here are Middleweight.

Top row is right about the top edge of middle weight

Close.
Rosalina: Heavy
King Boo: Heavy
Link: Heavy
Pauline: Heavy

Your sights are set a little too high.

If you really break it up, those characters are mid-heavyweight

You have a point...
But remember, stat influence is weird(and some things are the same despite not being the same irl.) Like, how does the Slim have the same stats as a friggin wagon wheel?

Precisely, but it’s best to live with it until MKW

I mean which characters are Heavyweight, but the game says they're Middleweight.
Basically, take Mario, Ludwig, or Mii(Medium), and try to identify which characters in this image have the same Kart size as Mario.