Hey so I had a question in terms of All minigames and it's categories. Why is it just Master Difficulty and then Any difficulty instead of dividing the categories like All Boards is with Easy, Normal, and Hard along with Master?

There will be no point in adding a Normal/Hard Sub-Category for all minigames. Hard would be almost the same thing as Master difficulty. Normal would be almost the same as Easy difficulty

Because some minigames are played with an master cpu (2v2) . It's the same in Mario Party Superstars and it's not a problem.