Win the Planet Cup tournaments in singles or doubles mode.
Alternate Yoshi's defensive power shot color
Win the Flower Cup tournaments in doubles mode.
Artist on the Court bonuses
Complete the indicated task to unlock the corresponding bonus.
Bowser and Bower Jr.'s painting: Complete Diddy Kong's painting within the time limit.
Diddy Kong's painting: Complete Luigi's painting within the time limit.
Luigi painting: Complete Mario's painting within the time limit.
Yoshi's painting: Complete Bowers and Bowser Jr.'s painting within the time limit.
Balloon Panic bonuses
Complete the indicated task to unlock the corresponding bonus.
Super Panic level: Complete the Panic level.
Ultra-Hyper Panic level: Complete the Super Panic level.
Balloon Panic mini-game
Win the Flower Cup tournaments in singles mode.
Bowser court
Win the Special Cup Fire tournament in singles mode.
Chain-Chomp Challenge bonuses
Complete the indicated task to unlock the corresponding bonus.
Famished Chomp level: Complete Hungry Chomp level with the highest score.
Hungry Chomp level: Complete Perkish Chomp level with the highest score.
Character bloopers
Play tournament mode and complete the first three championships (Mushroom Cup, Flower Cup, Star Cup) to view the credits, and watch some animated outtakes from the opening FMV sequence. Complete the next three championships you unlock from this (Rainbow Cup, Moonlight Cup, Planet Cup) to view the credits again, but with entirely new outtakes.
Coin Collectors bonuses
Complete the indicated task to unlock the corresponding bonus.
Coin Challenge level: Complete the Gold Rush level.
Gold Rush level: Complete the Jackpot level.
Jackpot level: Complete the Fever level.
Coin Collectors mini-game
Win the Mushroom Cup tournaments in singles mode.
Event mode
Hold Z + C + B then press A to get the "Event Games" option on the menu.
Fly Guy
Win the Mushroom, Flower, and Star Cup in singles mode.
Gooper Blooper bonuses
Complete the indicated task to unlock the corresponding bonus.
Master Blooper: Complete the Rival Blooper level.
Rival Blooper: Complete the Buddy Blooper level.
Infinite Balloon Panic Challenge
Complete Ultra-Hyper Panic.
Infinite Coin Collectors Challenge
Complete the Gold Rush Challenge.
Infinite Gooper Blooper Volley Challenge
Complete Master Blooper.
Infinite Terror Tennis Challenge
Complete Phrantic Phantoms.
Infinite Tic-Tac-Glow Challenge
Complete the Dazzle Shine Challenge.
Mario Bros. court
Win the Special Cup Lightning tournament in doubles mode.
Mecha Bowser Mayhem mini-game
Win the Mushroom Cup tournaments in singles mode.
Mecha Bowser Mayhem mini-game: Easy win
Once you get Petey Piranha it will be easier to win. She is tall enough to hit Bullet Bills when they come out.
Mecha-Bowser Mayhem bonuses
Complete the indicated task to unlock the corresponding bonus.
Iron Frame level: Complete the Aluminium Frame level.
Titanium Frame level: Complete the Iron Frame level.
Moonlight Cup
Win all the Rainbow Cup tournaments.
Paratroopa
Win all three Normal Cup tournaments in doubles mode.
Petey Piranha
Win the Special Cup Fire and Lightning tournaments in doubles mode.
Random character or court
To randomize your character or court selection, press X at the character or court selection screen. This will not randomize your character's attributes (Hand or Star) and will not randomize your game mode.
Score easily
Note: you must be playing a doubles match. Have at least one CPU player on the opposite team. The CPU must be in the position closest to the net. When you are about to return a serve, do a slow shot (B + A) and aim the ball so that it curves far and lands close to the net. The CPU player will either hit the net, or the ball will go far out of bounds depending on the character and difficulty. This usually will work, but the CPU will rarely return it successfully.
Use the following trick to get easy wins on the Fire and Thunder cup Gimmick tournaments. Unlock a Star player (for example, Bowser Jr.). Star players are much better. They seem to be better at returning and scoring on the opponent. Win the Fire cup to unlock the Gimmick courts in all exhibition modes. Win the Thunder cup to unlock Wriggler.
Shy Guy
Win all three Normal Cup tournaments in singles mode.
Skip credits
After you have seen the credits at least once, hold Start + A.
Special court options
Play a special court in the Special Cup to get more options for that venue.
Star Cup
Win all three Normal Cup tournaments.
Star for character
Win all three Normal Cup tournaments with a character to unlock his or her star version.
Taunts
Press A or B when your opponent hits the ball.
Terror Tennis bonuses
Complete the indicated task to unlock the corresponding bonus.
Pesky Poltergeists: Score 50 points in the "Goofy Ghosts" level within time limit.
Phrantic Phantoms: Score 150 points in the "Pesky Poltergeists" level within time limit.
Tic-Tac-Glow bonuses
Complete the indicated task to unlock the corresponding bonus.
Dazzle Shine level: Score 75 points in the "Sparke Shine" level within time limit.
Sparkle Shine level: Score 50 points in the "Glimmer Shine" level within time limit.
Tic-Tac-Glow Challenge: Score 75 points in the "Dazzle Shine" level within time limit.
Toad and Toadette appearance
In the introduction sequence when Wario and Waluigi look at the big scoreboard, you can see Toad and Toadette on the first part to the left on the scoreboard. Note: They are not playable characters.
Wriggler
Win the Special Cup Fire and Lightning tournaments in singles mode.
