Mario Tennis Open Cheats - 3DS
Luma - Complete the Superstar level of the Galaxy Rally Special Game.
Baby Mario - Complete 1-3 in the Super Mario Tennis Special Game.
Baby Peach - Complete the Pro Rings level of the Ring Shot Special Game.
Star Character - Beat the Champions Cup as a given character.
Dry Bowser - Complete the Inksplosion level of the Ink Showdown Special Game.
Fire Mario - Turn 2 characters into star characters.
Unlock CPU Difficulties
Ace difficulty - Beat the Final Cup tournament.
Pro difficulty - Beat the Champions Cup tournament.