Vanilla Midgets are professional wrestlers in a lighter weight class -- usually under 100kg (220 lbs.) -- Who are devoid of personality or character traits.
They are short and skinny (the "midget" part), and bland as all get-out ("vanilla"). But the IWC fucking LOVES THEM, because the IWC is full of people who confuse wrestling with gymnastics.
They do flippy shit all the time.