Unlockable - Unlock Ace COM skill level | |
| Ace COM skill level | To unlock the "Ace" Computer skill level for exhibition, defeat Planet Cup in either Singles or Doubles mode. |
Unlockable - Event Mode | |
| At Mario Tennis title screen hold Z button while pressing start to unlock Event mode. This is a tiebreak game, you are able to select from 3,5, or 7 points. This does not remain unlocked however, you must do the code every time. | |
Unlockable - Unlockable characters | |
| Patapata (Paratroopa) | To unlock Patapata (Paratroopa), just beat the 3 tournaments of the Normal Cup in doubles. |
| Hana-Chan (Wiggler) | To unlock Hana-Chan, just beat both Special tournaments (Fire and Thunder) in singles. |
| Boss Packun (Petey Piranha) | To unlock Boss Packun (Petey Piranha), just beat both Special tournaments (Fire and Thunder) in doubles. |
| Propera Hey-Ho (Fly Guy) | To unlock Propera Hey-Ho (Fly Guy), just beat the 3 tournaments of the Normal Cup in singles. |
Unlockable - Get a character's star | |
| To get a character's star version, just beat the 3 tournaments of the Normal Cup with a character and you will get the star for this character. | |
Unlockable - Unlock courts and special courts options | |
| Bowser Court | To unlock the Bowser court, just beat the Fire tournament of the Special Cup in singles. |
| Mario Bros Court | To unlock the Mario Bros court, just beat the Thunder tournament of the Special Cup in doubles. |
| Special courts options | To unlock all the options of a special court, just play on that court in the Special Cup. |
| Classic Mario course | beat the Fire Cup in doubles |
Unlockable - Unlockable Tournaments | |
| Rainbow Cup | Beat the Star Cup |
| Planet Cup | Beat the Moonlight Cup |
| Star Cup | Beat the Flower Cup |
| Flower Cup | Beat the Mushroom Cup |
| Thunder Cup | Beat the Fire Cup |
| Moonlight Cup | Beat the Rainbow Cup |
Unlockable - Unlockable Minigames | |
| Baloon Panic | Beat the Flower Cup in Singles |
| Coin Collectors | Beat the Mushroon Cup in Doubles |
| Mecha Bowser Mayhem | Beat the Mushroom cup in singles |
Unlockable - Colorful Yoshi | |
| Yoshi's Defensive Power Shot Color Change | Beat Flower Cup doubles with any character |
Unlockable - Teeror Tennis Unlockables | |
| 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. |
Unlockable - Tic-Tac-Glow Unlockables | |
| Sparkle Shine level | Score 50 points in the "Glimmer Shine" level within time limit. |
| Dazzle Shine level | Score 75 points in the "Sparke Shine" level within time limit. |
| Tic-Tac-Glow Challenge | Score 75 points in the "Dazzle Shine" level within time limit. |
Unlockable - Artist on the Court Unlockables | |
| Luigi Painting | Complete Mario's painting within time limit. |
| Diddy Kong's painting | Complete Luigi's painting within time limit. |
| Bowser and Bower Jr.'s painting | Complete Diddy Kong's painting within time limit. |
| Yoshi's painting | Complete Bowers and Bowser Jr.'s painting within time limit. |
Unlockable - Chain-Chomp Challenge Unlockables | |
| Hungry Chomp level | Complete Perkish Chomp level with the highest score. |
| Famished Chomp level | Complete Hungry Chomp level with the highest score. |
Unlockable - Gooper Blooper Unlockables | |
| Rival Blooper | Complete the Buddy Blooper level. |
| Master Blooper | Complete the Rival Blooper level. |
Unlockable - Balloon Panic Unlockables | |
| Super Panic level | Complete the Panic level. |
| Ultra-Hyper Panic level | Complete the Super Panic level. |
Unlockable - Mecha-Bowser Mayhem Unlockables | |
| Iron Frame level | Beat the Aluminium Frame level. |
| Titanium Frame level | Beat the Iron Frame level. |
Unlockable - Coin Collecters Unlockables | |
| Jackpot level | Beat the Fever level. |
| Gold Rush level | Beat the Jackpot level. |
| Coin Challenge level | Beat the Gold Rush level. |
Unlockable - Unlockable Infinite Challenges | |
| Gooper Blooper Volley Challenge | Beat Master Blooper |
| Balloon Panic Challenge | Beat Ultra-Hyper Panic |
| Coin Collectors Challenge | Beat Gold Rush Challenge |
| Tic-Tac-Glow Challenge | Beat Dazzle Shine Challenge |
| Terror Tennis Challenge | Beat Phrantic Phantoms |
Secret - Random select | |
| On the Select Character or Select Court screens, if you press the X button, then a random character/court will be selected. | |
Easter Egg - 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. Successfully 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. | |
Password - Event Mode Unlocked | |
| when at the start screen, press z and start at the same time to have an event button pop up for games with two or four players | |
| event mode pop up | Press z and start at title screen |
Password - Skip Credits | |
| When at the credits press Start + A, to skip the credits. | |
