Mario Tennis Cheats :
Cheats - Want to beat the Game?Well here's what you need!
by Unregistered Apr 27, 2005
A) After beating/completing the Star Tournament (the Star Tournament is Extremely Hard) in singles, you will get something that says: NEW--Ace! That means that you can now play with computers or other people who are extremely harder than computers/people who are Pro's. When you go pick a player who is a computer you can set their difficulty level to an ACE! The computer levels are as following: