Hint: Easy Points in Super Duel Mode
If you want to have a lot of points for Super Duel Mode, but don't want to spend time doing it, all you have to do is go into Mini-Game Mode and start "Free Play" and scroll to the section you want points in, and play a mini-game. But, the best way to do it in "Free Play" is to just start a mini-game in the section you want, then when the game starts, press START and then press Z. (quit) You will automatically return to the "Free Play" menu, and a point for Super Duel Mode. You don't even have to win or even complete the mini-game to get the point!

Hint: Fire Rain Minigame Blind Spot
In the Bowser mini game where he lights the fire works and it rains fire down on the characters, there is always a safe spot on the bottom edge of the circular platform. Just run to it and avoid the sparks every time.