I notice that Nintendo never included the blue shell or the golden mushroom etc
Blue Shell: If they added this, they could've have it attack the person who has the ball or closet to the ball causing an explosion that could hurt the players as well as Kritter if caught in the blast.
Golden Mushroom: if they added this, they could've have aloud each payer to be fast for an extended period of time and be invincible. I was also thinking they could've made it so everyone's greatest weakness increase for a certain period of time.
Lighting: shrink everyone that doesn't have the ball at that moment.
This is what I could think of. Any opinions ?